Which of the following reactions does no...

Which of the following reactions does not involve oxidation-reduction ?

A

`2Rb+2H_(2)Orarr2RbOH+H_(2)`

B

`2CuI_(2)rarr2CuI+I_(2)`

C

`NH_(4)Cl+NaOHrarrNaCl+NH_(3)+H_(2)O`

D

`4KCN+Fe(CN)_(2)rarrK_(4)[Fe(CN)_(6)]`

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The correct Answer is:

C, D

In both `(c ) and (d)`, the oxidation number of the various elements in the molecule do not change.

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