JEE Main Chemistry question

Chemistry Equilibrium JEE Main

The correct order of increasing [H₃O⁺] in the following aqueous solutions is:

(A)0.01 M H₂S < 0.01 M H₂SO₄ < 0.01 M NaCl < 0.01 M NaNO₂
(B)0.01 M NaCl < 0.01 M NaNO₂ < 0.01 M H₂S < 0.01 M H₂SO₄
(C)0.01 M NaNO₂ < 0.01 M NaCl < 0.01 M H₂S < 0.01 M H₂SO₄Correct
(D)0.01 M H₂S < 0.01 M NaNO₂ < 0.01 M NaCl < 0.01 M H₂SO₄

Answer: (C)

Solution

NaNO₂ (weak-acid salt, basic) < NaCl (neutral) < H₂S (weak acid, mildly acidic) < H₂SO₄ (strong acid).

Question ID VK-136215