41. Match the following
    

    	List-I		List-II
    F.	Zn	1.	Amalagamation
    G.	Ag	2.	Self reduction
    H.	Fe	3.	Carbon reduction
    J.	Ca	4.	carbon monoxide reduction
    K.	Cu	5.	Fused salt electroysis

    Codes :

    	F	G	H	J	K
    A.	3	1	4	5	2
    B.	2	4	3	1	5
    C.	5	1	2	4	3
    D.	5	3	4	2	1

1. 1. A.

   
   
   

   2. B.

   
   
   

   3. C.

   
   
   

   4. D.

   
   
   

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   NA

   Correct Option: A

   NA

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42. The purification of alumina is done by

1. 1. Baeyer's process

   
   
   

   2. Hoop's process

   
   
   

   3. Bosch process

   
   
   

   4. Castner process

   
   
   

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   NA

   Correct Option: A

   NA

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43. Pb and Sn are extracted from their chief ore by

1. 1. Carbon reduction and self reduction

   
   
   

   2. Self reduction and carbon reduction

   
   
   

   3. Electrolysis and self reduction

   
   
   

   4. Self reduction and electrolysis

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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44. Which of the following are not concentrated by froth floatation method ?

1. 1. Copper pyrite

   
   
   

   2. Pentlandite

   
   
   

   3. Pyrolusite

   
   
   

   4. Zinc blende

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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45. Steel differs from pig iron and wrought iron that it contains

1. 1. Less carbon

   
   
   

   2. More carbon

   
   
   

   3. Amount of carbon intermediate between these tow

   
   
   

   4. No carbon at all

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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