JEE Main Chemistry question

The decreasing order of nucleophilicity among the nucleophiles (A) CH₃COO⁻, (B) CH₃O⁻, (C) CN⁻, (D) a tosylate-type ArSO₃⁻ is

(A)(C), (B), (A), (D)
(B)(B), (C), (A), (D)Correct
(C)(D), (C), (B), (A)
(D)(A), (B), (C), (D)

Answer: (B)

Solution

Methoxide (a strongly basic, small, localized alkoxide) is the most nucleophilic; cyanide, though less basic, is highly polarizable and a good nucleophile; acetate is weakened by

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Question ID VK-139331