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Identify A and B. Gas (B) gives tes...

Identify `A` and `B`.

Gas `(B)` gives test for unsaturation, `i.e.,` it decolourises `Br_(2)` water and aqueous `KMnO_(4)` solution.

Text Solution

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The compound `(A)` should be `6C-`atom diabasic acid (four `C` atoms of `(B)` or `(C)` and two `(COOH)` groups. It can be as follows `:`

Therefore, `(A)` can be `(II)` not `(I)` (because `B` will not the give test of unsaturation).
Disodium`-2,3-`dimethyl succinate
or Disodium`-2,3-` dimethyl butane `-1,4-`dioate

At cathode, the reduction of `H_(2)O` takes place (since reduction potential of `H_(2)Ogt` reductiono potential of `Na^(o+)ion).`
`H_(2)O+e^(Θ)rarrO^(Θ)+1//2H_(2)(g)`
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