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Chemistry Question on Redox reactions

Which of the following represents a disproportionation reaction ?

A

\ceCl2+2OH−−>ClO−+Cl−+H2O\ce{Cl_2 + 2 OH^{-} -> ClO^{-} + Cl^{-} + H_2O}

B

\ceCu2O+H+−>Cu2++OH−\ce{Cu_2O + H^{+} -> Cu^{2+} + OH^{-}}

C

\ce2HCuCl2−>[dilution][with H2O]Cu+Cu2++4CI−+2H+\ce{2 HCuCl_2 ->[dilution][with \, H_2O] Cu + Cu^{2+} + 4 CI^{-} + 2 H^{+}}

D

All the three above

Answer

All the three above

Explanation

Solution

In all these reactions the same substance is reduced as well as oxidised.