JEE Main Chemistry question

Chemistry Organic Chemistry - Some Basic Principles and Techniques JEE Main

The decreasing order of strength of the bases, OH⁻, NH₂⁻, H−C≡C⁻ and CH₃−CH₂⁻, is:

(A)CH₃−CH₂⁻ > NH₂⁻ > H−C≡C⁻ > OH⁻Correct
(B)OH⁻ > NH₂⁻ > H−C≡C⁻ > CH₃−CH₂⁻
(C)OH⁻ > H−C≡C⁻ > NH₂⁻ > CH₃−CH₂⁻
(D)NH₂⁻ > OH⁻ > H−C≡C⁻ > CH₃−CH₂⁻

Answer: (A)

Solution

Base strength is inverse of parent-acid strength: ethane (pKa≈50) < NH₃

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Question ID VK-136434