JEE MAIN - Chemistry (2019 - 10th April Evening Slot - No. 1)

The increasing order of nucleophilicity of the following nucleophiles is :
(a) CH3CO2$$-$$           (b) H2O
(c) CH3SO3$$-$$           (d) $$\mathop O\limits^ - H$$
(b) < (c) < (a) < (d)
(b) < (c) < (d) < (a)
(a) < (d) < (c) < (b)
(d) < (a) < (c) < (b)

Explanation

When stability of nucleophile increases then nucleophilicity decreases.

Stability order :
H2O > CH3SO3$$-$$ > CH3CO2$$-$$ > $$\mathop O\limits^ - H$$

So Nucleophilicity order :
H2O < CH3SO3$$-$$ < CH3CO2$$-$$ < $$\mathop O\limits^ - H$$

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