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  4. The color of CoCl 3 ⋅ 5 NH 3 ⋅ H 2 O is

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Q. The color of $CoCl _{3} \cdot 5 NH _{3} \cdot H _{2} O$ is

BITSATBITSAT 2015

Solution:

$CoCl _{3} .5 NH _{3} \cdot H _{2} O$ is pink in colour.
It has $Co ^{3+}$ ion with $[ Ar ] 3 d ^{6}$ electronic configuration. It has $4$ unpaired electrons.