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Deep green precipitate of Cr(OH)3 gives yellow solution on addition H2O2 in presence of excess of base.

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in Chemistry by (54.1k points)

Deep green precipitate of Cr(OH)3 gives yellow solution on addition H2O2 in presence of excess of base. The yellow colour is due to 

a) Cr(OH)4 -ions 

b) Cr2O72-ions 

c) CrO42-ions 

d) CrO5

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1 Answer

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by (56.9k points)

Correct option is c) CrO42-ions 

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