Q.

K2Cr2O7 on heating with aqueous NaOH gives

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a

CrO4-2

b

CrOH3

c

Cr2O42−

d

CrOH2

answer is A.

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Detailed Solution

(1)Cr2O7-2→2CrOH-O4-2+H2O
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K2Cr2O7 on heating with aqueous NaOH gives