TEST PAPER 2

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.

1. The most important property of nanomaterials is_____.
   

   [A] force [B] friction [C} pressure [D] temperature

2. 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

3. _____ is not a primary colour of white light.
   

   [A] Red [B] Blue [C] Violet [D] Green

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

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

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

   [A] W = VQ [B] W = VIt [C] W = I2Rt [D] W = I2RQ

6. 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

7. 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

8. The insulation cover on the earth wire is_____.
   

   [A] red [B] black [C] green [D] white

9. _____ is the unit of frequency of alternating current.
   

   [A] Weber [B] Hertz [C] Tesla [D] Ampere

10. A high tide occurs_____.
    

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

11. Who discovered the laws of planetary motion?
    

    [A] Plato [B] Newton [C] Galileo [D] Kepler

12. The mass of earth is_____ times the mass of mercury.
    

    [A] 10 [B] 14 [C] 18 [D] 22

13. 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

14. 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

15. During a chemical reaction, the concentration of reactants_____.
    

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

16. The acid-base theory of Lewis is based on_____.
    

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

17. Preparation of vegetable ghee from vegetable oil is_____ reaction.
    

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

18. Which acid is present in the stomach of humans?
    

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

19. Brine is_____.
    

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

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

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

21. Helmets are made from_____.
    

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

22. The melting point of lime is_____ °C
    

    [A] 1000 [B] 1200 [C] 1539 [D] 2000

23. 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

24. 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

25. The formula of rust is_____.
    

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

26. How many nonmetals are in solid state?
    

    [A] 11 [B] 12 [C] 13 [D] 14

27. Sulphur belongs to_____ group in periodic table.
    

    [A] Boron [B] Carbon [C] Oxygen [D] Halogen

28. _____ is a neutral oxide.
    

    [A] CO2 [B] NO2 [C] CO [D] SO3

29. The formula of butanol is_____.
    

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

30. Yeast contains_____.
    

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

31. The boiling point of acetone is_____°C
    

    [A] 40 [B] 48 [C] 56 [D] 64

32. Which of the following is a condensation polymer?
    

    [A] Nylon [B] PVC [C] Natural rubber [D] TEFLON

33. The autotrophic organisms contain_____ pigment.
    

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

34. The energy released during cellular respiration is stored in_____.
    

    [A] ATP [B] glucose [C] lungs [D] ileum 

35. Which organism shows parasitic mode of nutrition?
    

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

36. Gaseous exchange occurs through _____ in earthworm.
    

    [A] lungs [B] skin [C] nephridia [D] mouth

37. _____ is associated with transport of water in plants.
    

    [A] Xylem [B] Phloem [C] Chloroplast [D] Aerenchyma

38. Urine mainly consists of_____.
    

    [A] uranium [B] urea [C] CO2 [D] sugar

39. _____ is/are synthesized at the shoot and root tips of plants.
    

    [A]Glucose [B] Starch [C] Hormones [D] Minerals

40. Plant hormones are called _____.
    

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

41. Nerve mass in invertebrates is called_____.
    

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

42. Which of the following shows thigmonastic response?
    

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

43. The structural and functional unit of the nervous system in multicellular organisms is _____.
    

    [A] neuron [B] brain [C] spinal cord [D] pons

44. Which of the following shows spore formation?
    

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

45. In a normal healthy woman, menstruation occurs every_____ days.
    

    [A] 14 [B] 28-32 [C] 21-24 [D] 270

46. The chromatids are joined to each other by_____.
    

    [A] chromosome [B] centromere [C] gene [D] DNA

47. Which of the following is a greenhouse gas?
    

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

48. Compounds of _____ cause Minamata disease.
    

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

49. Which rays strike the earth due to depletion of ozone layer?
    

    [A] Infrared [B] Microwaves [C] Ultraviolet [D] Visible

50. 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]

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

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

   
   
   
6. Write the formula of bleaching powder and mention its three uses.
   
7. Write about harmful effects of ethyl alcohol.
   OR
   Write a note on vulcanisation of rubber.
   
8. Describe aerobic respiration.
   OR
   Describe mechanism of breathing.
   
9. Describe photoperiodism.
   
10. Write a note on puberty.
    
    

    SECTION : C [5 x 3 marks, Total marks: 15]

    
    
    
11. Describe mirage with diagram.
    
12. 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.
    
13. Describe the magnetic field due to a current-carrying coil with diagram.
    
14. Describe preparation of hydrogen gas in laboratory with diagram.
    
15. Describe tracheids with neat diagram.
    OR
    Write a note on blood clotting.
    
    

    SECTION : D [3 x 5 marks, Total marks: 15]

    
    
    
16. Describe with diagram the process of preparation of charcoal from wood.
    OR
    Describe nuclear reactor with diagram.
    
17. Describe Hall-Heroult process for obtaining aluminum from alumina.
    
18. Write a note on Watson-Crick model for structure of DNA with diagram.