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Q.

Zn and Cd metals do not show variable valency because :

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a

They have only two electrons in the outermost subshells

b

Their d-subshells are completely filled

c

Their d-subshells are partially filled

d

They are relatively soft metals

answer is B.

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Detailed Solution

Zn and Cd metals do not show variable valency because their d-subshells are completely filled.
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