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Q.

The following ion exhibits color in aqueous solution?

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a

$C u^{+}$

b

$S c^{3 +}$

c

$N i^{2 +}$

d

$Z n^{2 +}$

answer is C.

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Detailed Solution

$N i^{+ 2}$ has 2 unpaired electrons.

ion exhibits color due to unpaired electrons.

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