21. Mercuric iodide dissolves in excess of KI and forms

1. 1. Hg₂I₂

   
   
   

   2. Hg

   
   
   

   3. K₂[HgI₄]

   
   
   

   4. K[Hgl₂]

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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22. Which of the following is used in making ointment for curing skin disease ?

1. 1. ZnCO₃

   
   
   

   2. ZnSO₄

   
   
   

   3. ZnO

   
   
   

   4. ZnS

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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23. March the List-I with List-II and select the correct answer using the codes given below the Lists
    

    	List-I (Mineral)		List-II (Industries in which largely used)
    F.	Lime stone	1.	Cement
    G.	Copper	2.	Electrical goods
    H.	Bauxite	3.	Manufacture aeroplanes
    J.	Manganese	4.	Steel

    Codes

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

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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24. Cadmium is almost found in the ore of

1. 1. Gold

   
   
   

   2. Silver

   
   
   

   3. Aluminium

   
   
   

   4. Zinc

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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25. Mercury is transported in metal containers make of

1. 1. Lead

   
   
   

   2. Silver

   
   
   

   3. Aluminium

   
   
   

   4. Iron

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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