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JIPMER 2016
Exam
JIPMER
Year
2016
Subject
Chemistry
Chapter
Ionic Equilibrium

JIPMER 2016 · Chemistry · Ionic Equilibrium

Aqueous solution of AlCl_3 is acidic towards litmus while of NaCl...

Aqueous solution of AlCl3\mathrm{AlCl}_3 is acidic towards litmus while of NaCl is not. The correct reason behind this is

Options

  1. AAlCl3\mathrm{AlCl}_3 furnishes OH−\mathrm{OH}^{-}ion in the solution
  2. BAlCl3\mathrm{AlCl}_3 furnishes H+\mathrm{H}^{+}ion in the solution
  3. CAlCl3\mathrm{AlCl}_3 furnishes both H+\mathrm{H}^{+}well as OH−\mathrm{OH}^{-}ion in the solution
  4. DAlCl3\mathrm{AlCl}_3 is the salt of strong base and strong acid

Correct answer

B. AlCl3\mathrm{AlCl}_3 furnishes H+\mathrm{H}^{+}ion in the solution

Step-by-step solution

AlCl3\mathrm{AlCl}_3 is the salt of weak base and strong acid which renders H+\mathrm{H}^{+}ions on hydrolysis. Thus, aqueous solution of AlCl3\mathrm{AlCl}_3 is acidic in nature. Al3++3H2O⇌Al(OH)3+3H+\mathrm{Al}^{3+}+3 \mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{Al}(\mathrm{OH})_3+3 \mathrm{H}^{+} On the other hand, NaCl is the salt of strong acid and strong base which does not undergo hydrolysis.
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