GSEB SSC SCIENCE TEST PAPERS

TEST PAPER 2

2010-09-25T11:16:00.000-07:00

SCIENCE TEST PAPER 2

[100 MARKS, FULL COURSE]

PART : A

There are 50 questions. Choose appropriate alternative for each question and accordingly mark the answer in the separately given OMR sheet by black-ink pen. Each question carries 1 mark.

The most important property of nanomaterials is_____.
```
[A] force [B] friction [C} pressure [D] temperature
```
The refractive index of a rarer medium with respect to a denser medium is_____.
```
[A] 1 [B] greater than 1 [C] smaller than 1 [D] negative
```
_____ is not a primary colour of white light.
```
[A] Red [B] Blue [C] Violet [D] Green
```

Work done on an electric charge is stored in it as_____.

[A] potential energy [B] kinetic energy [C] thermal energy [D] nuclear energy

Which of the following is not correct for electrical work?
```
[A] W = VQ [B] W = VIt [C] W = I²Rt [D] W = I²RQ
```
How many electrons should flow in one second to contribute electric current of 1 ampere?
```
[A] 6.25 x 10¹⁸ [B] 6.25 x 10¹⁹ [C] 1.60 x 10¹⁸ [D] 1.60 x 10¹⁸
```

The magnetic field of a solenoid is quite similar to that of_____

[A] a straight conductor [B] a horse-shoe magnet 
[C] a bar magnet         [D] magnetic needle

The insulation cover on the earth wire is_____.
```
[A] red [B] black [C] green [D] white
```
_____ is the unit of frequency of alternating current.
```
[A] Weber [B] Hertz [C] Tesla [D] Ampere
```

A high tide occurs_____.

[A] on every new moon day [B] on every full moon day [C] both A and B [D] everyday

Who discovered the laws of planetary motion?
```
[A] Plato [B] Newton [C] Galileo [D] Kepler
```
The mass of earth is_____ times the mass of mercury.
```
[A] 10 [B] 14 [C] 18 [D] 22
```

The tail of a comet is the longest when_____.

[A] it is nearest to Sun [B] it is farthest from Sun 
[C] it is far from Earth [D] it is near Jupiter

A rocket works on the principle of_____.

[A] Newton's first law of motion [B] Newton's second law of motion 
[C] Newton's third law of motion [D] First law of thermodynamics

During a chemical reaction, the concentration of reactants_____.

[A] does not change [B] increases [C] decreases [D] never decreases

The acid-base theory of Lewis is based on_____.

[A] proton transfer      [B] litmus test 
[C] theory of ionisation [D] transfer of electron pair

Preparation of vegetable ghee from vegetable oil is_____ reaction.

[A] chlorination [B] sulphonation [C] hydrolysis [D] hydrogenation

Which acid is present in the stomach of humans?

[A] sulphuric acid [B] hydrochloric acid [C] nitric acid [D] citric acid

Brine is_____.

[A] Na₂CO₃ [B] NaHCO₃ [C] NaCl [D] Na₂SiO₃

Which substance is a salt of weak acid and strong base?

[A] Slaked lime [B] Gypsum [C] Bleaching powder [D] Washindg soda

Helmets are made from_____.

[A] manganese steel [B] chromium steel [C] cobalt steel [D] silicon steel

The melting point of lime is_____ °C
```
[A] 1000 [B] 1200 [C] 1539 [D] 2000
```

Liquefaction method is used for the purification of metals with_____.

[A] high melting point [B] low melting point 
[C] high boiling point [D] low boiling point

The true order of reactivity of metals is_____.

[A] Mg>Al>Zn>Fe [B] Mg>Zn>Fe>Al [C] Al>Mg>Zn>Fe [D] Zn>Mg>Al>Fe

The formula of rust is_____.

[A] FeSO₄ [B] Fe₂O₃.xH₂O [C] Fe₃O₄.xH₂O [D] FeCO₃

How many nonmetals are in solid state?
```
[A] 11 [B] 12 [C] 13 [D] 14
```
Sulphur belongs to_____ group in periodic table.
```
[A] Boron [B] Carbon [C] Oxygen [D] Halogen
```
_____ is a neutral oxide.
```
[A] CO₂ [B] NO₂ [C] CO [D] SO₃
```

The formula of butanol is_____.

[A] CH₃OH [B] C₂H₅OH [C] C₃H₇OH [D] C₄H₉OH

Yeast contains_____.

[A] invertase                 [B] zymase 
[C] both invertase and zymase [D] neither invertase nor zymase

The boiling point of acetone is_____°C
```
[A] 40 [B] 48 [C] 56 [D] 64
```
Which of the following is a condensation polymer?
```
[A] Nylon [B] PVC [C] Natural rubber [D] TEFLON
```

The autotrophic organisms contain_____ pigment.

[A] methylene blue [B] chlorophyll [C] phenolphthalin [D] carbon black

The energy released during cellular respiration is stored in_____.
```
[A] ATP [B] glucose [C] lungs [D] ileum 
```

Which organism shows parasitic mode of nutrition?

[A] Cascuta [B] Plasmodium [C] ascaris [D] all three

Gaseous exchange occurs through _____ in earthworm.
```
[A] lungs [B] skin [C] nephridia [D] mouth
```
_____ is associated with transport of water in plants.
```
[A] Xylem [B] Phloem [C] Chloroplast [D] Aerenchyma
```
Urine mainly consists of_____.
```
[A] uranium [B] urea [C] CO₂ [D] sugar
```
_____ is/are synthesized at the shoot and root tips of plants.
```
[A]Glucose [B] Starch [C] Hormones [D] Minerals
```

Plant hormones are called _____.

[A] hypohormones [B] metahormones [C] phytohormones [D] cytohormones

Nerve mass in invertebrates is called_____.

[A] neuron [B] pelvis [C] brain [D] ganglion

Which of the following shows thigmonastic response?

[A] Sun flower [B] Insectivorous plant [C] Lotus [D] Bryophyllum

The structural and functional unit of the nervous system in multicellular organisms is _____.
```
[A] neuron [B] brain [C] spinal cord [D] pons
```

Which of the following shows spore formation?

[A] Amoeba [B] Mucor [C] Plasmodium [D] Paramoecium

In a normal healthy woman, menstruation occurs every_____ days.
```
[A] 14 [B] 28-32 [C] 21-24 [D] 270
```
The chromatids are joined to each other by_____.
```
[A] chromosome [B] centromere [C] gene [D] DNA
```

Which of the following is a greenhouse gas?

[A] Methane [B] Oxygen [C] Nitrogen [D] Hydrogen

Compounds of _____ cause Minamata disease.

[A] Mercury [B] Cadmium [C] Cobalt [D] Arsenic

Which rays strike the earth due to depletion of ozone layer?
```
[A] Infrared [B] Microwaves [C] Ultraviolet [D] Visible
```
Oxygen Pond method has been developed by _____.
```
[A] NACO [B] UNESCO [C] GROFED [D] NEERI
```

PART : B

There are 18 questions in all. Total Marks for Part-B are 50 and Time period is 2 hours.

SECTION : A [5 x 2 marks, Total marks: 10]

Explain the use of nanotechnology in diagnostics.
Distinguish between real image and virtual image (two points)
OR
Mention the characteristics of image formed by a plane mirror.
Explain primary and composite colours giving examples.
Mention characteristics of Jovian planets.
OR
Describe four uses of artificial satellites.
Mention the criteria of chemical equilibrium.

SECTION : B [5 x 2 marks, Total marks: 10]
Write the formula of bleaching powder and mention its three uses.
Write about harmful effects of ethyl alcohol.
OR
Write a note on vulcanisation of rubber.
Describe aerobic respiration.
OR
Describe mechanism of breathing.
Describe photoperiodism.
Write a note on puberty.

SECTION : C [5 x 3 marks, Total marks: 15]
Describe mirage with diagram.
Derive the formula for equivalent resistance when three resistances are connected in parallel.
OR
Three resistors of 5Ω, 10Ω and 30Ω are connected in parallel with a battery of 12 V. Find (i) the current passing through each resistor (ii) the total current of the circuit (iii) the equivalent resistance of the circuit.
Describe the magnetic field due to a current-carrying coil with diagram.
Describe preparation of hydrogen gas in laboratory with diagram.
Describe tracheids with neat diagram.
OR
Write a note on blood clotting.

SECTION : D [3 x 5 marks, Total marks: 15]
Describe with diagram the process of preparation of charcoal from wood.
OR
Describe nuclear reactor with diagram.
Describe Hall-Heroult process for obtaining aluminum from alumina.
Write a note on Watson-Crick model for structure of DNA with diagram.

PLEASE READ THIS FIRST...

2010-08-29T10:41:00.000-07:00

Recently the pattern for 100 mark exam papers has been modified by the GSEB. Accordingly, we will have PART-A of 50 MCQs (50 marks) and PART-B of descriptive answers consisting of 2-mark, 3-mark & 5-mark questions (50 marks). I am preparing new question papers as per new pattern. As soon as I finish, I shall start posting new set of papers.

TEST PAPER 32 : CHAPTER 18 : ENVIRONMENT & ENVIRONMENTAL PROBLEMS : 25 MARKS

2009-02-06T09:50:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Which one is a greenhouse gas ?

Methane
Oxygen
Nitrogen
Hydrogen

World Environment Day is observed on...

5th March
15th April
15th May
5th June

______ is not an environmental problem.

Wastage of water
Conservation of water
Deforestation
Land erosion

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What is studied in environmental biology ?
Mention the major reason for environmental problems.
What is eutrophication ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Mention types of environment with examples.
Explain : Acid rain.
Write about biodegradable pollutants.
Explain : Environmental balance.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe harmful effects of water pollution.
What is air pollution ? Describe methods of controlling gaseous pollutants.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe prevention and control of water pollution.

TEST PAPER 31 : CHAPTER 17 : HEREDITY & EVOLUTION : 25 MARKS

2009-02-06T09:48:00.000-08:00

There are 15 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

Which of the following is not a nitrogenous base ?

Adenine
Guanine
Cytosine
Deoxyribose sugar

______ gave Germplasm theory.

Lamarck
Weismann
Darwin
Hugo De Vries

Fossils of _____ provide evidence of evolution as the connecting link between birds and reptiles.

Dinosaurs
Lizard
Archeopteryx
Ostrich

Which principle was given by Darwin ?

Inheritance of acquired characters
Germplasm theory
Mutation theory
Theory of natural selection

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
Give biological meaning of variation.
What are homologous chromosomes ?
What is the biological name of fruit fly ?
What is a retrovirus ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Explain : Heredity.
Explain : Mutation.
Describe the role of environment in sex determination.
Write in brief about components of nucleotides.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 9]
Mention types of chromosome and describe any two.
Mention different evidences to support evolution and describe comparative embryology.
Describe the Watson-Crick model for the structure of DNA(diagram not essential).

TEST PAPER 30 : CHAPTER 16 : REPRODUCTION IN ORGANISMS : 25 MARKS

2009-02-06T09:46:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Yeast reproduces by ______.

budding
fission
regeneration
spore formation

The 14th day of sexual cycle in human female is important because on that day...

ovulation occurs
she becomes pregnant
menstrual flow starts
she gives birth to a child

Embryo is protected during development by...

placenta
umbilical cord
amnion
oviduct

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Give two examples of organisms reproducing by fission.
What is fragmentation ?
What is gestation ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
What is reproduction ? Mention its importance.
Mention accessory reproductive glands and their function in human male.
Mention symptoms of STDs.
Describe budding in hydra.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe reproduction by spore formation.
Describe methods of birth control.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe sexual cycle in human female.

TEST PAPER 29 : CHAPTER 15 : CONTROL & COORDINATION IN LIVING ORGANISMS : 25 MARKS

2009-02-06T09:44:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

The sunflower plant bends towards the sun. It is _____ response.

thigmonastic
seismonastic
thermonastic
photonastic

The space between meninges is filled with...

lymph
blood plasma
cerebrospinal fluid
ACTH

Which organ is not controlled by autonomous nervous system ?

Heart
Uterus
Glands
Eyes

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What is stimulus ?
What does nervous system of insects consist of ?
What is the function of cerebellum ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
What is tropism ? Mention its types.
Describe photoperiodism.
Mention characteristics of hormones.
Mention four endocrine glands. Why is pituitary gland called master gland ?

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe : Nastic movement.
Write a note on autonomous nervous system.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe : Spinal cord and reflex action.

TEST PAPER 28 : CHAPTER 14 : TRANSPORTATION, CIRCULATION & EXCRETION IN ORGANISMS : 25 MARKS

2009-02-06T09:42:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Which one is not a property of blood plasma ?

It is pale yellow.
It is nonliving.
It is acidic.
It carries hormones.

Which of the following is true ?

Heart purifies blood.
Heart separates excretory wastes from blood.
Heart circulates blood.
Heart supplies oxygen to blood.

Where are antigens located ?

On WBC
On RBC
On platelets
In blood plasma

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Where are plant hormones synthesised ?
Define : Blood transfusion.
Why is the circulation of blood through heart called 'double circulation'?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Write a note on tracheids.
Write a note on blood platelets.
Draw a neat diagram of human excretory system.
Describe the process of formation of urine.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe clotting of blood.
Write a note on lymphatic system.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe excretion and osmoregulation.

TEST PAPER 27 : CHAPTER 13 : NUTRITION & RESPIRATION IN ORGANISMS : 25 MARKS

2009-02-06T09:40:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

The layer of dead cells having tiny openings on the roots is called...

root nodule
stomata
chlorenchyma
lenticels

Cockroach shows _____ mode of nutrition.

herbivorous
carnivorous
omnivorous
parasitic

The function of incisors is ______.

cutting
tearing
grinding
chewing

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What are autotrophic organisms ?
How does the rate of photosynthesis depend upon the intensity of light ?
Through what does the frog respire ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Eaplain : Saprophytic nutrition.
Describe exchange of gases in tissues.
Describe aerobic respiration.
Describe respiration in insects.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe the light phase of photosynthesis.
Describe nutrition in amoeba with diagram.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe human respiratory system.

TEST PAPER 26 : CHAPTER 12 : ORGANIC COMPOUNDS : 25 MARKS

2009-02-06T09:38:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Oxidation of ethanol in presence of alkaline potassium permanganate gives...

acetaldehyde
ethane
potassium ethoxide
acetic acid

The enzyme which converts milk into curd is...

lactase
invertase
zymase
cellulase

Vinegar is...

methanol
ethanal
methanoic acid
ethanoic acid

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Mention the boiling point of ethanol.
Write the equation for the combustion of ethanol.
What is formalin ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Explain : Functional group.
What is a polymer ? Give its classification.
Distinguish between soap and detergent(2 points).
Describe preparation of formaldehyde and write its reaction with hydrogen cyanide.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe preparation of ethanol from sugar(molasses).
Describe preparation of polyester and write its uses.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe preparation of acetic acid by fermentation and by chemical synthesis. Write its physical properties and its reaction with ethanol in presence of concentrated sulphuric acid.

TEST PAPER 25 : CHAPTER 11 : NONMETALS : 25 MARKS

2009-02-04T09:31:00.001-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

The formula of carbonic acid is ______.

H₂CO₃
H₃CO₂
HCO₃
H₂CO₂

How many nonmetals are in gaseous state ?

7
8
9
10

The transition temperature of sulphur is ___ °C.

90
92
94
96

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Give the example of a nonmetal which conducts heat & electricity.
Why is ammonia not collected by downward displacement of water ?
Which crystalline form of sulphur is the most stable ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Write chemical equations : (i) When phosphorus pentoxide is dissolved in water.(ii) When ammonia reacts with oxygen in presence of platinum.
Mention four uses of ammonia.
Mention four physical properties of sulphur.
Describe preparation of sulphur from natural gas and oils.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe allotropes of sulphur(diagrams not necessary).
Describe manufacture of sulphuric acid by contact process.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe laboratory preparation of hydrogen with diagram.

TEST PAPER 24 : CHAPTER 10 : METALS : 25 MARKS

2009-02-04T09:28:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Liquefaction method is used for the purification of metals with ______.

high melting point
low melting point
high boiling point
low boiling point

Pure gold is ______ carats.

20
22
24
100

The melting point of iron is ______ °C.

1539
1639
1739
1839

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Define : Ore.
What do we mean by metallurgy ?
What is rust chemically ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Write a note on magnetic separation.
Explain calcination with example.
Explain the importance of ultrapure metals.
What is an alloy ? Give two examples.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe Bayer's process to obtain pure alumina from bauxite.
Describe reactions of metals with water giving proper chemical equations.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Mention two ores of iron and write their formulae. Describe the manufacture of iron using blast furnace(diagram not essential).

TEST PAPER 23 : CHAPTER 9 : SOME IMPORTANT CHEMICAL COMPOUNDS : 25 MARKS

2009-02-04T09:23:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Steel is an alloy of ______.

iron and silica
iron and nickel
iron and chromium
iron and carbon

The formula of baking soda is ______.

NaHCO₃
Na₂CO₃.10H₂O
Na₂CO₃
Na₂SiO₃

______ is used for making permanent magnets.

Manganese steel
Chromium steel
Cobalt steel
Silicon steel

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What is the chemical name of washing soda ?
How much carbon does steel contain ?
What is the full form of RCC ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Describe how bleaching powder is manufactured.
Mention four uses of lime.
Mention the composition of stainless steel and one important property.
Write a few points on coloured glass.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Describe ammonia soda process to manufacture washing soda.
Describe manufacture of glass.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Write a note on Plaster of Paris explaining its preparation, properties and uses.

TEST PAPER 22 : CHAPTER 8 : RATE OF CHEMICAL REACTION-CHEMICAL EQUILIBRIUM : 25 MARKS

2009-02-04T09:22:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

During a chemical reaction, the concentration of reactants...

does not change
increases
decreases
may increase

______ defined p^H in 1909.

Arrhenius
Sorensen
Lewis
Haber

Preparation of vegetable ghee from vegetable oil is ______ reaction.

chlorination
sulphonation
hydrogenation
hydrolysis

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Why are the definitions of acid and base by Robert Boyle called 'operational' type ?
Define : Molarity.
State the Law of Mass Action.

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Define rate of reaction and state its unit.
Describe Arrhenius' concept of acid and base.
What is a reversible reaction ? Give an example.
Mention the factors affecting the rate of a chemical reaction.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Explain chemical equilibrium with an nexample.
Derive the expression for the equilibrium constant for the reaction A + B ----> C + D.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Explain : Dynamic nature of chemical equilibrium.

TEST PAPER 21 : CHAPTER 7 : UNIVERSE : 25 MARKS

2009-02-04T09:20:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Sun rises in the west on ______.

Mercury
Mars
Pluto
Venus

1 light year = ______ km.

9.46 x 10¹¹
9.46 x 10¹²
4.96 x 10¹¹
4.96 x 10¹²

The minimun velocity required for a satellite to remain in the orbit is ______.

8 km/s
8 km/h
800 km/h
800 m/s

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What is 'photosphere' ?
Name two planets which do not have natural satellites.
What is the speed of revolution of Sun ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Define solar system and write the names of the planets in the ascending order of their distance from sun.
Write four points about saturn.
Mention two major disasters of space shuttles.
Mention uses of artificial satellites in communication.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Explain how the space shuttle is brought back from space.
Write six major points about asteroids.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Write a detailed note on comets.

TEST PAPER 20 : CHAPTER 6 : ENERGY SOURCES : 25 MARKS

2009-02-01T00:38:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

How much solar energy reaches earth's surface ?

3.8 x 10²⁴ J/s
3.8 x 10²⁶ J/s
1.7 x 10¹⁷ J/s
1.7 x 10²⁶ J/s

The number of carbon atoms in hydrocarbon molecule of kerosene is...

5 - 8
8 - 11
10 - 14
12 - 16

The calorific value of biogas is ______ kJ/g.

30 - 35
35 - 40
40 - 45
45 - 50

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
what is the full form of LPG ?
What is the benefit of Ocean Thermal Energy ?
What is the boiling range of diesel ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
How are smokeless chulhas more efficient than the traditional chulhas ?
Give reason : The calorific value of wood is lower than that of the hydrocarbons.
Explain how the energy obtained from fusion is better than that obtained from fission reactions ?
Mention limitations of windmills.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Explain construction and working of solar cells.
Describe an experiment to find the calorific value of wax.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
What is chain reaction ? Describe ideal conditions to support a nuclear chain reaction.

TEST PAPER 19 : CHAPTER 5 : MAGNETIC EFFECTS OF ELECTRIC CURRENT : 25 MARKS

2009-02-01T00:36:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Who was the first scientist to observe the magnetic effect of electric current ?

Faraday
Ampere
Oersted
Volta

The direction of magnetic field lines is taken...

north pole to south pole
south pole to north pole
entering both poles
leaving both poles

The insulation cover on live wire is...

red
black
green
white

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
What is induced current ?
What do we mean by frequency of current ?
Which metal is generally used to make a fuse wire ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Explain : Right-hand thumb rule with diagram.
Mention two advantages of alternating current.
Domestic appliances are joined in parallel. Why ?
Explain : Electromagnetic induction.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Write a note on solenoid.
Draw a schematic diagram of domestic wiring.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe electric motor with diagram.

TEST PAPER 18 : CHAPTER 4 : ELECTRICITY : 25 MARKS

2009-02-01T00:14:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

When resistors are connected in series...

voltage drop is uniform
current is uniform
both voltage and current are uniform
neither of the two is uniform

1 A = ______ mA.

100
1000
10^(-3)
10⁶

Equivalent resistance of resistances in parallel is...

smaller than the smallest resistance
greater than the greatest resistance
an average of all resistances
algebraic sum of all resistances

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
What type of charge does a glass rod acquire when it is rubbed with silk cloth ?
Define : Electroplating.
Current flows in a wire. Can we call the wire charged ? Why ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]
Mention two disadvantages of series connection.
Explain the cause of resistance in a conductor. What are conductors and insulators ?
Define electric power and write different equations of power.
A lamp of resistance 20 ohm is joined to a battery of 12 V. Find the value of the resistance to be connected in series with the lamp in order to get current of 0.5 A.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Define electric current and explain the difference of electron current and conventional current.
What is series connection? Derive the formula of equivalent resistance for three resistors connected in series.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Describe Ohm's experiment and write its conclusion.

TEST PAPER 17 : CHAPTER 3 : DISPERSION OF LIGHT & OPTICAL INSTRUMENTS

2009-01-28T07:26:00.001-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

Arranging in the ascending order of wavelength, which one is true ?

Blue, Green, Red
Orange, Green, Red
Blue, Yellow, Green
Orange, Yellow, Green

Green + magenta = ______.

Cyan
Yellow
Red
White

In spectrum obtained with prism, which colour is deviated maximum ?

Violet
Green
Orange
Red

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Define : Dispersion of light.
Why does a green leaf appear green ?
Mention the principle of simple microscope.

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Why does dispersion of light occur ? Explain.
Explain : Primary and composite colours.
Why do defects of vision arise ?
Explain : Complementary colours.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Explain : Farsightedness with diagram.
Draw the ray diagram to show the working of a compound microscope(diagram only).

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Explain subtractive method of mixing of pigments.

TEST PAPER 16 : CHAPTER 2 : LIGHT-REFLECTION AND REFRACTION : 25 MARKS

2009-01-28T07:03:00.000-08:00

There are 13 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

The speed of light is ______ in vacuum.

3 x 10⁵ m/s
3 x 10⁸ m/s
3 x 10⁸ km/s
3 x 10⁶ km/s

We can see objects because of ______.

reflection
refraction
transmission
dispersion

Which of the following is a true statement?

The power of a lens is always positive.
The power of a lens is always negative.
The power of a convex lens is positive.
The power of a concave lens is positive.

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
Define : Radius of curvature of a mirror.
Mention the position, nature and the size of the image formed by a convex lens when the object is placed at 2F₁.
What will be the power of a convex lens of focal length 40 cm ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
Describe irregular reflection.
Draw the ray diagram to show the position, nature and the size of the image when an object is placed between C and F of a concave mirror.
State the laws of refraction.
An object of height 6 cm is placed at distance of 10 cm from a convex mirror with radius of curvature 30 cm. Find the position, nature and the height of its image.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
Explain the nature of light.
Explain : Reflection from plane mirror. OR Explain : Mirage with diagram.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
Derive Lens formula.

TEST PAPER 15 : CHAPTER 1 : INTRODUCTION TO NANOTECHNOLOGY : 25 MARKS

2009-01-28T06:12:00.000-08:00

There are 15 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

1 meter = ______ nm.

10⁹
10^(-9)
10¹⁰
10^(-10)

The diameter of hydrogen atom is ______ nm.

10
1
0.1
0.01

______ are the extensions of bucky balls.

Geodesic domes
Hexagons
Carbon nanotubes
AFM and STM

The size of a quantum dot is ______ m.

5
5 x 10^(-9)
5 x 10^(-10)
5 x 10^(-11)

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
What is atomic engineering ?
What is the full form of MEMS ?
Who photographed nanotubes for the first time ?
What is the use of nanocrystals ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
What possibilities will nanotechnology offer ?
Why is carbon a fundamental element in nanotechnology ?
Explain the influence of nanotechnology on environment.
Explain : Nanotechnology plays by different rules.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 9]
Write a note on nanotechnology and health care.
Explain the concept of nanotubes with diagram.
Mention any six benefits of nanotechnology to mankind.

TEST PAPER 14 : ALL CHAPTERS : 100 MARKS

2008-11-05T10:23:00.000-08:00

There are 54 questions in all and time limit is 3 hours.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark
each, Total marks 15]

The cut-off limit of human eye to see is ______.

1 nm
100 nm
1000 nm
10000 nm

Magnification for convex mirror is ______.

always positive
always negative
0
1

Who had patented more than 1000 inventions during his life time ?

Edison
Volta
Ampere
Faraday

______ was the first person to notice the magnetic effect of electric current.

Faraday
Ampere
Oersted
Maxwell

Bombardment of neutron on ⁶Li₃ gives ______.

¹H₀
¹H₁
²H₁
³H₁

The sun stays in one nakshatra for about ______.

30 days
13.5 days
7 days
1 day

Conversion of milk into curd is ______.

a physical change
a chemical change
not a chemical change
neither a physical nor a chemical change

Helmets are made from ______.

manganese steel
chrome steel
cobalt steel
silicon steel

An organic acid + an alcohol --> ______.

an aldehyde
a ketone
an ester
an amide

Which of the following is the monomer of natural rubber ?

Isoprene
Chloroprene
Neoprene
TEFLON

Liquefaction method is used for the purification of metals with ______.

high melting point
high boiling point
low melting point
low boiling point

Urine mainly consists of ______.

uranium
urea
CO₂
sugar

Plant hormones are called ______.

hypohormones
metahormones
phytohormones
cytohormones

Mutation theory was given by ______.

Lamarck
Darwin
Hugo De Vries
Mendel

World Environment Day is celebrated every year on ______.

5th March
15th April
15th May
5th June

SECTION - B : ANSWER IN SHORT : [1 mark each, Total
marks 15]
What is a simple microscope ?
Define : 1-ohm resistance.
What type of magnetic field arises when current passes through a linear wire ?
Where are hot water geysers found in Gujarat ?
What did Ptolemy believe about the Universe ?
Which is the gas mainly present in the atmosphere of Pluto ?
Define : p^H.
Write the formula of acetone cyanohydrin.
What is the full form of PABA ?
Where does the biosynthetic phase of photosynthesis take place ?
Mention the types of nephridia in earth worm.
Define : Reproduction.
Where are genes located ?
What does environment mean ?
What is meant by biodegradable pollutants ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total
marks 24]
Write a brief note on bucky ball.
Distinguish between compound microscope and astronomical telescope[2 points]
A lamp of resistance 20Ω is joined to a battery of 12 V. Find the value of the resistance to be connected in series with the lamp in order to get current of 0.5 A. OR Explain the importance of earthing wire.
Explain : The energy obtained from nuclear fusion is better than that obtained from fission reactions.
Calculate the p^H of 0.03 M aqueous solution of NaOH.(Take log₁₀ 3 = 0.4771). OR Mention the criteria of chemical equilibrium.
Write a note on saponification.
Mention four uses of hydrogen.
Describe exchange of gases in tissues.
Write four points about erythrocytes.
Explain the importance of ultrapure metals.
Mention the characteristics of hormones.
Explain : Homologous organs OR Draw a chart showing types of environment.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each,
Total marks 21]
Describe Ohm's experiment. OR Derive an expression for equivalent resistance(R) when three resistors of R₁, R₂ and R₃ Ω are connected in parallel.
Explain : Solenoid.
Describe preparation of Plaster of Paris, write its two properties and two uses. OR Describe preparation of acetic acid by fermentation as well as by chemical method.
Describe refining of metals by electrochemical method.
Mention organs of human respiratory system and describe mechanism of breathing.
Draw a neat diagram of brain and write about hind brain.
Explain : Grafting with diagram.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total
marks 25]
Explain : Total internal reflection and mirage with diagram.
Describe nuclear reactor with diagram. OR Write a note on construction and working of a space shuttle with simple diagram.
With the help of an experiment explain the concept of dynamic nature of chemical equilibrium.
Write a detailed note on ammonia, its manufacture and mention its properties and uses.
Describe the structure of chromosome with diagram. OR Describe Watson-Crick model for the structure of DNA.

TEST PAPER 13 : ALL CHAPTERS : 100 MARKS

2008-11-01T01:50:00.000-07:00

There are 54 questions in all and time limit is 3 hours.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark
each, Total marks 15]

A bucky ball is a molecule consisting of ______ carbon atoms.

50
60
70
100

In the spectrum of white light obtained with prism, ______ colour is deviated maximum.

violet
red
green
orange

Which of the following is not correct ?

P = W/t
P = I²R
P = WI
P = VI

The insulation cover on the earth wire is ______ in colour.

red
black
green
white

1 eV = ______ joule.

1.6 x 10^(-17)
1.6 x 10^(-18)
1.6 x 10^(-19)
1.6 x 10^(-20)

The stars appearing ______ have very high/highest temperature.

red
blue
white
yellow

The acid-base theory by Bronsted and Lowry...

is based on donation of electron.
does not give importance to the solvent.
gives importance to the solvent.
gives operational definition of acid and base.

The formula of soda ash is ______.

NaHCO₃
Na₂CO₃
Na₂CO₃.10H₂O
NaOH

What is the boiling point of acetic acid ?

98 °C
108 °C
118 °C
128 °C

______ is the formula of cuprite.

Cu₂O
Cu₂S
CuCO₃
CuCl₂

______ is a neutral oxide.

Na₂O
CO₂
CO
SO₃

The lungs are covered by two membranes called ______.

glottis
epiglottis
pleura
sphincter

______ pairs of spinal nerves arise from spinal cord.

21
31
23
46

The method by which the desired characters of two plants can be combined is...

cutting
layering
budding
grafting

The principle of inheritance of acquired characters was given by...

Lamarck
Weismann
Darwin
Hugo De Vries

SECTION - B : ANSWER IN SHORT : [1 mark each, Total
marks 15]
Who photographed nanotubes for the first time ?
State Snell's law.
What is overloading ?
What is magma ?
Mention the calorific values of charcoal and wood ?
What is corona ?
State the p^H of the solution whose p^OH is 3.925.
Why is NaCl added to the Plaster of Paris ?
Write the chemical formulas of butanal and propanone.
What is gangue ?
Why is sulphuric acid known as the King of chemicals ?
What is the function of phloem ?
What is 'scion' ?
Mention the limitation of Darwinism.
What is conservation of environment ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total
marks 24]
Explain primary and composite colours giving examples. OR Explain why defects of vision arise.
What is electrolysis ? Write Faraday's laws of electrolysis.
Mention two advantages of alternating current.
How are smokeless chulhas more efficient than traditional chulhas ? OR Mention names of terrestrial planets and their characteristics.
Write a note on safety glass.
What are condensation polymers ? Give examples.
Explain with example : Reaction of nonmetals with chlorine.
Describe biosynthetic phase of photosynthesis with diagram. OR Explain : Rhesus factor.
Describe endocrine glands in short.
What individual care should one take to prevent sexually transmitted diseases (STDs) ?
Explain : Variation.
Describe sewage treatment.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each,
Total marks 21]
Describe tensile strength and thermal conductivity as properties of nanotubes.
Explain Cartesian sign convention for spherical mirrors with the help of a diagram.
Explain the re-use of byproducts obtained during Solvay's ammonia soda process. OR Describe three chemical properties of ethyl alcohol(ethanol).
Write a note on allotropes of sulphur.
Describe nutrition in amoeba with diagram.
Explain : Tropism OR Describe regeneration as a method of reproduction.
Mention harmful effects of water pollution.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total
marks 25]
Describe construction and working of a simple voltaic cell.
Explain Solar water heater with a neat diagram. OR Describe various orbits of artificial satellites giving appropriate details.
Derive the expression for the equilibrium constant for the reaction : A + B --> C + D .
Describe extraction of aluminium from bauxite using Bayer's process and Hall-Heroult process. OR Explain how metals react with oxygen, water and dilute acids giving proper examples.
Describe excretion in earthworm.

TEST PAPER 12 : ALL CHAPTERS : 100 MARKS

2008-10-21T08:13:00.000-07:00

There are 54 questions in all and time limit is 3 hours.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark
each, Total marks 15]

The diameter of a bucky ball is about ______.

1 A°
10 A°
100 A°
1000 A°

Absolute refractive index of any medium is always ______.

1
greater than 1
smaller than 1
0

The unit of electric current is ______.

coulomb-second
coulomb/second
volt/second
coulomb/volt

The direction of magnetic field lines is taken ______.

N to S
S to N
entering both poles
leaving both poles

______ is the superior quality of coal.

Peat
Lignite
Bituminous
Anthracite

How many satellites does mercury have ?

30
21
8
0

The concentration of H⁺ ions in neutral water is ______.

1 x 10^-7 mol/lit
-7.0 mol/lit
7.0 mol/lit
(1/7) mol/lit

Brine is ______.

Na₂CO₃
NaHCO₃
NaCl
Na₂SiO₃

The enzyme that converts milk to curd is ______.

lactase
invertase
zymase
cellulase

Brass is an alloy of ______.

copper and nickel
copper and zinc
copper and tin
copper and iron

The atomic number of sulphur is ______.

15
16
17
18

______ shows phagocytosis.

Amoeba
Locust
Earthworm
Cockroach

Which multicellular organism lacks the nervous system ?

Hydra
Locust
Sponge
Cockroach

Disease caused by Treponema Palidium is _______.

AIDS
Syphilis
Gonorrhoea
Typhoid

Minamata disease is caused by the pollution of

Mercury
Lead
Arsenic
Cadmium

SECTION - B : ANSWER IN SHORT : [1 mark each, Total
marks 15]
What are complimentary colours ?
How many electrons should flow in one second to contribute electric current of 1 ampere ?
What type of magnetic field arises when current passes through a linear wire ?
Define : Solar constant.
Why does the candle get extinguished when air is blown ?
How many meters make 1 light year ?
What is 1 molar(1 M) solution ?
Write the chemical name of plaster of Paris.
What is the monomer of natural rubber ?
What is e.m.f. series (of metals) ?
Give two examples of neutral oxides.
What is the life span of human erythrocytes ?
What is reflex arc ?
What are homologous chromosomes ?
What is Greenhouse effect ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total
marks 24]
Mention the use of nanotechnology for resources like energy and water.
Explain why dispersion of light occurs.
Three resistors of 5 Ω, 10 Ω and 15 Ω are connected in parallel.If the voltage is 3 V, find the overall current flowing through the circuit. OR Explain the right hand thumb rule for straight conductor.
Write a note on Jupiter.
Describe Arrhenius' concept of acid and base.
Write addition reactions(one each) of formaldehyde and propanone. OR Write a brief note on soap.
Explain calcination giving examples of two reactions.
Explain : Exchange of gases in leaves. OR Describe excretion and osmoregulation in amoeba.
Mention characteristics of hormones.
Write a note on puberty.
Explain homologous organs with example.
Describe Oxidation pond method.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each,
Total marks 21]
Describe chemical effect of electric current giving example. OR Derive the expression for equivalent resistance(R) of three resistors connected in series.
Explain : Solenoid.
Describe the manufacture of bleaching powder. Write its reaction with dilute sulphuric acid and mention two uses.
Describe froth floatation process with diagram. OR Describe Bayer's process for the concentration of bauxite ore.
Describe light phase of photosynthesis. OR Describe digestive system of grasshopper with diagram.
Describe the role of sex hormones in humans.
Describe Mendel's concept of heredity.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total
marks 25]
Derive lens formula.
Describe fractional distillation of petroleum with neat diagram and mention the products obtained. OR Describe construction and working of a space shuttle(diagram not necessary).
Explain physical equilibrium with example.
Describe laboratory preparation of hydrogen with diagram.
Describe transportation of mineral elements in plants with diagram. OR Draw a neat diagram of heart and explain its working.

TEST PAPER 11 - UNITS 6,7,8 - 50 MARKS

2008-10-11T11:26:00.000-07:00

There are 26 questions in all and time limit is 90 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 7]

In insects the air enters the tracheal system through ______.

spiracles
nostrils
lungs
bronchi

The function of incisors is ______.

cutting
tearing
grinding
chewing

There are ______ types of antigens on erythrocytes.

five
four
three
two

A sunflower plant bends towards the sun; it is ______ response.

thigmonastic
seismonastic
thermonastic
photonastic

______ is useful where seeds have long dormancy period and poor germination capacity.

Cutting
Layering
Grafting
Regeneration

______ is an example of retrovirus.

Virus causing AIDS
TMV
Bacteriophage
RIV

Eutrophication increases due to increase in ______.

BOD
industrialisation
DOB
soil erosion

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 7]
Through what does a frog respire ?
What is lymph ?
Which plant hormones retard growth ?
What is menopause ?
What is the difference between prokaryotic and eukaryotic chromosomes ?
What is meant by organic evolution ?
What is the full form of NEERI ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 12]
Describe the effect of water and carbon dioxide on the process of photosynthesis.
Write a note on blood platelets.
Explain : Photoperiodism OR Mention the names of four endocrine glands in humans.
Distinguish between asexual and sexual reproduction(two points).
Explain : Variation.
Mention two effects of land pollution. OR Draw a chart showing types of environment.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 9]
Describe exchange of gases in roots and stems with diagram. OR Describe digestive system of grass-hopper with diagram.
Write a note on tropism.
Mention any six laws for environmental protection in India.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 15]
Describe excretion in eatrhworm. OR Describe the structure of nephron with diagram.
Describe sexual cycle in human female.
Write a note on types of chromosomes with diagram.

TEST PAPER 10 - UNITS 4,5 - 50 MARKS

2008-10-11T10:48:00.000-07:00

There are 26 questions in all and time limit is 90 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 7]

In p^H scale, the base of the logarithm of molar concentration of H₃O⁺ ion is ______.

10
20
50
100

What is used as an antacid ?

Na₂CO₃
NaHCO₃
NaCl
NaOH

______ is an ore of calcium.

Magnetite
Siderite
Malachite
Gypsum

______ is a poor conducting metal for heat.

Copper
Silver
Aluminium
Lead

There are ______ nonmetallic elements.

20
22
24
25

______ have fruity smell.

Alcohols
Organic acids
Esters
Ketones

Which of the following is artificial rubber ?

Isoprene
Chloroprene
Neoprene
TEFLON

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 7]
What is used as catalyst in the preparation of vegetable ghee ?
Give two examples of irreversible reaction.
What is the full form of RCC ?
Write the chemical equation for the preparation of quick lime.
Why are metals like sodium, pottasium and aluminium not available in free state in nature ?
Why is ammonia not collected by downward displacement of water ?
Write the chemical equation for the combustion of ethanol.

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 12]
Mention the criteria for chemical equilibrium.
Describe the preparation of bleaching powder giving chemical reaction. OR Mention four uses of washing soda.
Give chemical equations : (i) when iron reacts with steam (ii) when magnesium reacts with hot boiling water. OR Write the chemical equations involved in Bayer's process.
Describe Frasch process to obtain sulphur(no diagram).
Describe : Vulcanisation of rubber.
Describe harmful effects of ethanol.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 9]
Write the chemical formula of ordinary glass and describe its manufacture.
Write three chemical properties of sulphur dioxide.
Describe preparation of methanal from methanol, mention two properties and two uses of methanal. OR Write an introductory note on carbonyl compounds.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 15]
Explain the concept of dynamic nature of chemical equilibrium giving example.
What is concentration of ore ? Describe the process used to concentrate a sulphide ore. OR Describe refining of metals by elecrolysis giving example.
Describe preparation of hydrogen in laboratory with neat diagram.

TEST PAPER 9 - UNITS 1,2,3 - 50 MARKS

2008-10-10T10:58:00.000-07:00

There are 27 questions in all and time limit is 90 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark
each, Total marks 7]

"There is plenty of room at the bottom." This was stated by...

Issac Newton
Albert Einstein
Richard Feynman
Eric Drexler

The mirror formula is ______.

(1/u)-(1/v) = (1/f)
(1/f)+(1/u) = (1/v)
f = uv/(u+v)
f = (u+v)/uv

In a transparent medium, the velocity of ______ light is the least.

red
green
yellow
violet

1 unit of domestic electric energy is equal to...

1 joule
1 watt-second
3.6 x 10⁶ j
3.6 x 10⁶ kwh

The current passing through two separate lines(circuits) of our houses is ______ A and ______ A.

5,10
5,15
10,15
2,5

During the refining of petroleum, the fraction having highest boiling temperature...

condenses first
condenses last
does not condense
remains in gaseous form

______ is the largest planet of our solar system.

Earth
Jupiter
Saturn
Neptune

SECTION - B : ANSWER IN SHORT : [1 mark each, Total
marks 8]
What is a bucky tube ?
What is an image ?
Current flows in a wire. Can we call the wire charged ? Why ?
Define : Induced electric current.
Define : Solar constant.
What is the full form of KVIC ?
What are meteors ?
What is the basic concept(belief) of Steady-state theory ?

SECTION - C : ANSWER IN BRIEF : [2 marks each, Total
marks 10]
Mention applications of bucky ball and carbon nanotubes.
An object is placed at 30 cm in front of a convex lens of focal length 20 cm. Find the position of its image. OR Draw the ray diagram to show working of a compound microscope.
What is electrolysis ? Write Faraday's laws of electrolysis. OR Mention disadvantages of using direct current(DC).
Mention two categories of solar appliances with examples.
Mention the names and the characteristics of terrestrial planets.

SECTION - D : ANSWER THE FOLLOWING : [3 marks each,
Total marks 15]
Mention the role of nanotechnology in security.
Describe with the help of a diagram how the seven colours of light can be combined to get white light.
Explain : Electric potential and electric potential difference.
Explain : Solar water heater with diagram. OR Describe construction and working of a biogas plant(no diagram).
Write a note on Nakshatras. OR Mention six uses of artificial satellites.

SECTION - E : ANSWER IN DETAIL : [5 marks each, Total
marks 10]
Derive the generalised form of Snell's law.
Derive the expression for equivalent resistance(R) when three resistors R₁,R₂ and R₃ are connected in parallel and find the current flowing through a circuit containing three resistors of 10 Ω, 5 Ω, and 5 Ω connected in parallel with potential difference 4 V. OR Describe the principle and working of an electric generator with diagram.

TEST PAPER 8 - UNIT 8 - 25 MARKS

2008-10-01T10:43:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

The number of genes in human being is about...

23
46
1,000 to 2,000
30,000 to 40,000

______ gave Germplasm theory.

Lamarck
Weismann
Darwin
Hugo De Vries

Biological oxygen demand of ______ is the least.

sewage
sea water
pure water
polluted water

______ is the first step of sewage treatment.

Precipitation
Chlorination
Sedimentation
Aeration

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

Define : Heredity.
Mutation is one of the reasons of variation. True or false ?
Mention the major reason for environmental problems.
What is biomagnification ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Explain : Analogous organs giving example. OR Mention components of nucleotides.
Explain : Acid rain.
Describe oxidation pond method.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Explain Mendel's concept of heredity.
Describe harmful effects of water pollution. OR Describe the interrelationship among population, environment and development.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Describe Watson-Crick model for the structure of DNA with diagram.

TEST PAPER 7 - UNIT 7 - 25 MARKS

2008-10-01T10:27:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

______ is the complimentary system of nervous system.

Circulatory system
Endocrine system
Lymphatic system
Skeletal system

______ hormone regulates ionic balance.

Vasopressin
Thyroxin
Glucagon
Testosteron

______ is a very useful method for developing garden.

Cutting
Layering
Grafting
Budding

The normal weight of human child at the time of birth should be ______.

1.5 kg
1.5 to 2.5 kg
3.0 to 3.5 kg
5.0 to 6.5 kg

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

What is photoperiodism ?
What is meant by autonomous nervous system ?
Give two examples of organisms reproducing by spore formation.
What is vasectomy ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Mention two characteristics of hormones.
Give two examples of nastic movement.
Mention accessory reproductive glands and their function in human male. OR Mention symptoms of sexually transmitted diseases.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Write in brief about spinal cord.
Describe budding as a method of reproduction.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Describe female reproductive system in humans with diagram.

TEST PAPER 6 - UNIT 6 - 25 MARKS

2008-10-01T01:55:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

The energy released during cellular respiration is stored in ______.

ATP
glucose
NADPH₂
lungs

Cockroach shows ______ mode of nutrition.

herbivorous
carnivorous
omnivorous
grazing

______ is a necessary mineral for clotting of blood.

Calcium
Potassium
Iron
Zinc

Birds excrete wastes in the form of ______.

urea
proteins
uric acid
water

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

What is the aim of nutrition ?
Write the chemical equation for aerobic respiration.
Define : Translocation.
Where are blood antigens located ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Describe parasitic nutrition.
Describe mechanism of breathing.
Write a note on leucocytes.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Describe nutrition in amoeba with diagram.
Describe human excretory system with diagram.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Describe human respiratory system(diagram not needed). OR Describe : Phloem with diagram.

TEST PAPER 5 - UNIT 5 - 25 MARKS

2008-10-01T01:41:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

During electrolytic reduction, ______ acts as reducing agent.

anode
cathode
electrolyte
metal

______ is used for manufacturing scientific balance.

Steel
Brass
Stainless steel
Magnalium

There are ______ nonmetals in solid state.

11
12
13
14

Sulphur belongs to ______ group in periodic table.

Boron
Carbon
Oxygen
Halogen

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

Define : Metallurgy.
What is the use of Van Arkel's method ?
Why do nonmetals not react with dilute acids ?
Which crystalline form of sulphur is most stable ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Describe roasting with two examples.
Mention four uses of hydrogen.
Describe preparation of sulphur from natural gas.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Describe extraction of aluminium by Hall-Heroult method with diagram.
Describe manufacture of ammonia and mention its three uses.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Write a note on chemical reduction method. ORDescribe manufacture of iron using blast furnace.

TEST PAPER 4 - UNIT 4 - 25 MARKS

2008-09-30T10:58:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

Formation of petroleum in earth's crust is a ______ reaction.

geochemical
biochemical
physiochemical
physical

Pyrex glass is ______.

plasticized glass
polymeric glass
heat-resistant glass
opaque glass

Ethylethanoate is ______.

an alcohol
an acid
an ester
a ketone

Which of the following is not an oxidising agent ?

NaBH₄
KMnO₄
Cr₂O₃
Fehling's solution

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

Define : Rate of reaction.
State the Law of Mass-Action.
Who prepared Portland cement for the first time ? When ?
What is formalin ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Explain : Molarity.
Describe manufacture of lime.
Show that the H atom in the -COOH group has acidic nature.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Describe Ammonia-Soda process to obtain washing soda.
Write chemical properties of formaldehyde giving chemical equations. OR Describe preparation of polyamides(nylon) and give its two uses.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Write a detailed note on p^H.

TEST PAPER 3 - UNIT 3 - 25 MARKS

2008-09-30T10:34:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

What is used generally as a connecting material in solar panels ?

Silicon
Silver
Selenium
Germanium

______ invented artificial radioactivity.

Marie Curie
Berkley
Lord Rudherford
Maxwell

The mass of earth is ______ times the mass of mercury.

10
14
18
22

Each nakshatra is an angular region of about ______.

15° 30'
14° 40'
13° 20'
12° 30'

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

What is the wavelength of visible light in meter ?
How is charcoal obtained from wood ?
What is corona ?
What is celestial sphere ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Mention two advantages and two limitations of solar cooker.
Explain the theory of formation of our solar system.
Explain the installation of artificial satellite by space shuttle.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Mention six characteristics of ideal fuel.
Write a note on asteroids(six points).
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Write a note on Nuclear reactor with a neat diagram. OR Write a note on galaxy.

TEST PAPER 2 - UNIT 2 - 25 MARKS

2008-09-30T00:16:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

The equivalent resistance of three resistors, each of 6 Ω, connected in parallel is ______.

6 Ω
18 Ω
2 Ω
0.5 Ω

Which of the following is not correct for the electrical work ?

W = VQ
W = VIt
W = I²Rt
W = I²RQ

What is the frequency of current used domestically in India ?

50 Hz
60 Hz
110 Hz
220 Hz

The principle of magnetic induction was given by ______.

Faraday
Galileo
Oersted
Ampere

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

Define : Electrical potential.
What causes resistance in a conductor ?
What is over-loading ?
What is alternating current(AC) ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

State two disadvantages of series connection.
If 300 mA current passes through a lamp, how many electrons will pass through it in 1 minute ?
Explain the work(importance) of a fuse.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Explain the construction and working of a simple Voltaic cell.
Explain the experiment to show the presence of magnetic field due to electric current.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Describe Ohm's experiment OR Describe electric motor with neat diagram.

TEST PAPER 1 - UNIT 1 - 25 MARKS

2008-09-29T00:40:00.000-07:00

There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

1 nanometer = ______ cm.

10^-9
10^-8
10^-7
10^-6

The most important property of nanomaterials is ______.

force
friction
pressure
ductility

For a plane mirror, magnification (m) = ______.

0
1
+1 or -1
< 1

Blue + Green (light) = ______.

Magenta
Cyan
Yellow
Violet

SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

Define : Nanotechnology.
Define : Principal focus of convex lens.
Why does a green leaf appear green ?
Mention the principle of simple microscope.
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

Explain the use of nanotechnology in diagnostics.
Explain : Regular reflection.
Explain : Near-sightedness(no diagram).
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

Describe the concept of nanotubes.
Describe subtractive method of mixing of pigments.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

Derive mirror formula.