TEST PAPER 4 - UNIT 4 - 25 MARKS

There are 14 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

1. Formation of petroleum in earth's crust is a ______ reaction.
   
   
   
   1. geochemical
   2. biochemical
   3. physiochemical
   4. physical
      
   
   
2. Pyrex glass is ______.
   
   
   
   1. plasticized glass
   2. polymeric glass
   3. heat-resistant glass
   4. opaque glass
      
   
   
3. Ethylethanoate is ______.
   
   
   
   1. an alcohol
   2. an acid
   3. an ester
   4. a ketone
      
   
   
4. Which of the following is not an oxidising agent ?
   
   
   
   1. NaBH₄
   2. KMnO₄
   3. Cr₂O₃
   4. Fehling's solution
      
   
   

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

   
   
5. Define : Rate of reaction.
6. State the Law of Mass-Action.
7. Who prepared Portland cement for the first time ? When ?
8. What is formalin ?
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

   
   
9. Explain : Molarity.
10. Describe manufacture of lime.
11. Show that the H atom in the -COOH group has acidic nature.
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

    
    
12. Describe Ammonia-Soda process to obtain washing soda.
13. 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]

    
    
14. Write a detailed note on p^H.