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When aqueous NaOH is added to an aqueous...

When aqueous NaOH is added to an aqueous solution of chromium (III ) ions, a green blue precipitate is first formed which re - dissolves to give a green solution. The green colour is due to

A

`[Cr(H_2O)_6]^(3+)`

B

`[Cr(OH)_4]^(-)`

C

`CrO_4^(2-)`

D

`[Cr(OH)_3(H_2O)_3]`

Text Solution

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The correct Answer is:
B
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