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The sodium salt of an organic acid X produces effervescence with concentrated 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

Options

  1. AHCOONa
  2. BCH 3 COONa
  3. CNa 2 C 2 O 4
  4. DC 6 H 5 COONa

Correct answer

C. Na 2 C 2 O 4

Step-by-step solution

Na 2 C 2 O 4 + H 2 SO 4 → Na 2 SO 4 + CO + CO 2 + H 2 O Compound X is Sodium oxalate Na 2 C 2 O 4 .

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