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

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

A

HCOONa

B

`CH_(3)COONa`

C

`Na_(2)C_(2)O_(4)`

D

`C_(6)H_(5)COONa`

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