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Which of the following reactions is not ...

Which of the following reactions is not a redox reaction?

A

`H_(2)O_(2)+KOHrarrKHO_(2)+H_(2)O`

B

`Cr_(2)O_(7)^(2-)+2overset(ө)OHrarr2CrO_(4)^(2-)+H_(2)O`

C

`Ca(HCO_(3))_(3)overset(Delta)rarrCaCO_(3)+CO_(2)+H_(2)O`

D

`H_(2)O_(2)rarrH_(2)O+(1)/(2)O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
(a) Oxidation state of `K is +1` in both reactant and product.
(b), Oxidation state of `Cr(+6)` does not change.
In (c ), oxidation states of `Ca` and `C` and `O` do not change. In (d), the `H_(2)O_(2)` which disproportionates is both oxidising and a reducing agent.
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