JEE PYQ: Haloalkanes And Haloarenes Question 20
Question 20 - 2019 (10 Apr Shift 2)
The increasing order of nucleophilicity of the following nucleophiles is:
(1) $\text{CH}_3\text{CO}_2^-$
(2) $\text{H}_2\text{O}$
(3) $\text{CH}_3\text{SO}_3^-$
(4) $\overline{\text{O}}\text{H}$
(1) (a) < (d) < (c) < (b)
(2) (b) < (c) < (d) < (a)
(3) (d) < (a) < (c) < (b)
(4) (b) < (c) < (a) < (d)
Show Answer
Answer: (4)
Solution
(i) Negatively charge molecule is more nucleophilic than neutral molecule. (ii) Concentrated negatively charged molecule is more nucleophilic than delocalised negatively charge molecule. Order: $\text{H}_2\text{O} < \text{CH}_3\text{SO}_3^- < \text{CH}_3\text{CO}_2^- < \text{OH}^-$.
BETA
