JEE Main Chemistry question

Chemistry Equilibrium JEE Main

The degree of dissociation of a weak acid is 1.34% at 0.1 M concentration. Its dissociation constant is:

(A)8×10⁻⁶
(B)1.79×10⁻⁵Correct
(C)0.182×10⁻⁵
(D)8×10⁻⁵

Answer: (B)

Solution

Ka≈Cα²=0.1×(0.0134)²=1.80×10⁻⁵.

Question ID VK-136429