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JIPMER2016ChemistryIonic Equilibrium

Aqueous solution of AlCl ₃ is acidic towards litmus while of NaCl is not. The correct reason behind this is

Options

  1. AAlCl ₃ furnishes OH ⁻ ion in the solution
  2. BAlCl ₃ furnishes H ⁺ ion in the solution
  3. CAlCl ₃ furnishes both H ⁺ well as OH ⁻ ion in the solution
  4. DAlCl ₃ is the salt of strong base and strong acid

Correct answer

B. AlCl ₃ furnishes H ⁺ ion in the solution

Step-by-step solution

AlCl ₃ is the salt of weak base and strong acid which renders H ⁺ ions on hydrolysis. Thus, aqueous solution of AlCl ₃ is acidic in nature. Al ³⁺+3 H ₂ O Al ( OH )₃+3 H ⁺ On the other hand, NaCl is the salt of strong acid and strong base which does not undergo hydrolysis.

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