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Sodium salt of an organic acid 'X' produ...

Sodium salt of an organic acid 'X' produces effervescence with conc. `H_(2)SO_(4)`. 'X' reacts with the acidified aqueous `CaCl_(2)` solution to give a white precipitate which decolourises acidic solution of `KMnO_(4) 'X'` is

A

`C_6 H_5 COONa`

B

`HCOONa`

C

`CH_3 COONa`

D

`Na_2 C_2 O_4`

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The correct Answer is:
D
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