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Anhydrous cobalt(II) chloride is blue in...

Anhydrous cobalt(II) chloride is blue in colour but on dissolving in water it changes to pink in colour because

A

Its oxidation state changes

B

Its magnetic character changes

C

Its coordination number changes .

D

In water it shows fluorescence

Text Solution

Verified by Experts

The correct Answer is:
C
`Co^(II)CI_2`, has a blue colour in tetrahedral geometry. It changes to pink in colour with the change in coordination number to six.
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