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Which of the following reactions do not ...

Which of the following reactions do not involve oxidation reduction?
I) `2Cs + 2H_2O +2CsOH + H_2`
II) `2CuI_2 to 2CuI + I_2`
III) `NH_4Br +KOH to KBr +NH_3 + H_2O`
IV) `4KCN + Fe(CN)_2 to K_4[Fe(CN)_6] `

A

I, II

B

I, III

C

I, III, IV

D

III, IV

Text Solution

Verified by Experts

The correct Answer is:
D
Reaction III. `{:(NH_4^(+), to, NH_3),(x = -3,,x = -3):}` (No change in oxidation number)
Reaction IV is not redox. No change in the oxidation number of either `Fe^(2+)` or `CN^(Theta)` in both reactant and product, hence, not redox reaction.
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