Which of the following is a disproporationation reaction ?

Options

A. `Cu_(2)O+2H^(o+)rarrCu+Cu^(2+)+H_(2)O`
B. `2CrO_(4)^(2-)+2H^(o+)rarrCr_(2)O_(7)^(2-)+H_(2)O`
C. `CaCO_(3)+2H^(o+)rarrCa^(2)+H_(2)O+CO_(2)`
D. `Cr_(2)O_(7)^(2-)rarr2overset(ө)OHrarr2CrO_(4)^(2-)+H_(2)O`

Answer

A

Explanation

Statement is self explanatory.