Q.

The gas liberated at electrode in dry cell is removed in the form a complex.The formula of the complex formed is 

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a

Zn(NH3)4+2

b

Zn(NH3)2+2

c

Zn(NH3)2+4

d

Zn(NH3)4+1

answer is B.

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Detailed Solution

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Gas liberated at anode is NH3, and is removed in the form a complex with Zn+2

formed at anode as follows

Zn+2+4NH3Zn(NH3)4+2

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