Correct arrangement of the following nucleophiles in the order of their nucleophilic strength is:

C_{6} H_{5} O^{-} < C H_{3} O^{-} < C H_{3} C O O^{-}

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C H_{3} C O O^{-} < C_{6} H_{5} O^{-} < C H_{3} O^{-}

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C_{6} H_{5} O^{-} < C H_{3} C O O^{-} < C H_{3} O^{-}

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C H_{3} C O O^{-} < C H_{3} O^{-} < C_{6} H_{5} O^{-}

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Solution

The correct option is B $C H_{3} C O O^{-} < C_{6} H_{5} O^{-} < C H_{3} O^{-}$
As delocalization of negative charge increases, its availability to donate to an electrophile decreases and hence nucleophilicity decreases.
Acetate anion is more stable than phenoxide ion.

So, nucleophilic strength follows the order:
$C H_{3} C O O^{-} < C_{6} H_{5} O^{-} < C H_{3} O^{-}$

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