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Question

Chemistry Question on d -and f -Block Elements

K2Cr2O7K_2Cr_2O_7 in acidic medium converts into

A

Cr2+Cr^{2+}

B

Cr3+Cr^{3+}

C

Cr4+Cr^{4+}

D

Cr5+Cr^{5+}

Answer

Cr3+Cr^{3+}

Explanation

Solution

Cr2O2−+14H++6e−−>2Cr3++7H2O { Cr2O^{2-} + 14H+ + 6e- -> 2Cr^{3+} + 7H2O}