JEE Main 11 April 2015 Paper

Section: Chemistry

Question : 48 of 90

Marks: +1, -0

When concentrated HCI is added to an aqueous solution of CoCl2 its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction ?

[Main 11 Apr 2015]

[CoCl6]4−
[CoCl6]3−
[CoCl4]2−
[Co(H2O)6]2+

Validate

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