The color of $C o {C l}_{3} .5 {N H}_{3} . H_{2} O$ is:

red

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orange

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orange-yellow

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pink

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Solution

The correct option is D pink
$C o {C l}_{3} .5 {N H}_{3} . H_{2} O$ is pink in colour.
It has $C o^{3 +}$ ion with $[A r] 3 d^{6}$ electronic configuration. It has 4 unpaired electrons.

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