JEE MAIN - Chemistry (2017 (Offline) - No. 4)
Sodium salt of an organic acid ‘X’ produces effervescence with conc. H2SO4. ‘X’ reacts with the acidified
aqueous CaCl2 solution to give a white precipitate which decolourises acidic solution of KMnO4. ‘X’ is :
CH3COONa
Na2C2O4
C6H5COONa
HCOONa
Giải thích
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