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Q.

Zinc does not show the variable valency as elements of d-block, because

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a

Volatile metal

b

its melting point is low

c

This is soft metal

d

d-orbital is full

answer is C.

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Detailed Solution

Zinc does not show the variable valency as elements of d-block, because d-orbital is full. Its outer electronic configuration is 3d104s2

So, they tend to lose only 2 electrons from their outermost shell. Hence, only show a valency of +2 and no variable valency.

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