166. The ore present in India in abundance is

1. 1. Monazite

   
   
   

   2. Magnetite

   
   
   

   3. Bauxite

   
   
   

   4. Fluorspar

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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167. Pyrolusite is

1. 1. MnO

   
   
   

   2. Mn₂O₃

   
   
   

   3. MnO₂

   
   
   

   4. SnO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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168. 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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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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169. 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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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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170. 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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