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AIIMS 2008
Exam
AIIMS
Year
2008
Subject
Chemistry
Chapter
Ionic Equilibrium

AIIMS 2008 · Chemistry · Ionic Equilibrium

The correct order of increasing ([H_3 O^ + ])in the following...

The correct order of increasing (\left[\mathrm{H}_3 \mathrm{O}^{+}\right])in the following aqueous solutions is

Options

  1. A(0.01 \mathrm{M} \mathrm{H}_2 \mathrm{~S} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4 < 0.01 \mathrm{M} \mathrm{NaCl} < 0.01 \mathrm{M} \mathrm{NaNO}_2)
  2. B(0.01 MNaCl<\mathrm{M} \mathrm{NaCl} \lt0.01 \mathrm{M} \mathrm{NaNO}}_{2} \lt 0.01 \mathrm{M} \mathrm{H}}_{2}  S<\mathrm{~S} \lt0.01 \mathrm{M} \mathrm{H}}_{2} \mathrm{SO}}_{4})
  3. C(0.01 \mathrm{M} \mathrm{NaNO}_2 < 0.01 \mathrm{M} \mathrm{NaCl} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{~S} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4)
  4. D(0.01 \mathrm{M} \mathrm{H}_2 \mathrm{~S} < 0.01 \mathrm{M} \mathrm{NaNO}_2 < 0.01 \mathrm{M} \mathrm{NaCl} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4).

Correct answer

C. (0.01 \mathrm{M} \mathrm{NaNO}_2 < 0.01 \mathrm{M} \mathrm{NaCl} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{~S} < 0.01 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4)

Step-by-step solution

H2SO4\mathrm{H}_2 \mathrm{SO}_4 is strong acid having pH<7.NaNO2\mathrm{pH} < 7 . \mathrm{NaNO}_2 on hydrolysis gives alkaline solution of pH>7\mathrm{pH}>7. NaCl\mathrm{NaCl} is neutral and H2 S\mathrm{H}_2 \mathrm{~S} is weak acid.
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