TEST PAPER 5 - UNIT 5 - 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. During electrolytic reduction, ______ acts as reducing agent.
   
   
   
   1. anode
   2. cathode
   3. electrolyte
   4. metal
      
   
   
2. ______ is used for manufacturing scientific balance.
   
   
   
   1. Steel
   2. Brass
   3. Stainless steel
   4. Magnalium
      
   
   
3. There are ______ nonmetals in solid state.
   
   
   
   1. 11
   2. 12
   3. 13
   4. 14
      
   
   
4. Sulphur belongs to ______ group in periodic table.
   
   
   
   1. Boron
   2. Carbon
   3. Oxygen
   4. Halogen
      
   
   

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

   
   
5. Define : Metallurgy.
6. What is the use of Van Arkel's method ?
7. Why do nonmetals not react with dilute acids ?
8. Which crystalline form of sulphur is most stable ?
   

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

   
   
9. Describe roasting with two examples.
10. Mention four uses of hydrogen.
11. Describe preparation of sulphur from natural gas.
    

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

    
    
12. Describe extraction of aluminium by Hall-Heroult method with diagram.
13. Describe manufacture of ammonia and mention its three uses.
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

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