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Q.

An aqueous solution of CoCl2 on addition of excess of concentration HCl turns blue due to formation of

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a

[CoH2O4Cl2]

b

[CoH2O2Cl4]−2

c

[CoCl4]−2

d

[CoH2O2Cl2]

answer is C.

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Detailed Solution

CoCl2+2Cl−→CoCl4−2 Blue colour in water
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