Which of the aqueous solution of the following salt has colour?

Z n (N O_{3}

)

_{2}

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N i S O_{4}

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C a C l_{2}

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N a C l

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Solution

The correct option is A $N i S O_{4}$
$N i^{+ 2} d^{8}$ configuration, have 2 unpaired electron so it will show colour in aq. solution.
All other salts dont have d-electron for transition so they dont show colour.

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