Question

What is the correct order of the rate of alkaline hydrolysis of these esters?

$CH_{3}COOCH_{3}\left[\right.rate=r_{1}\left]\right.$ , $CH_{3}COOC_{2}H_{5}\left[\right.rate=r_{2}\left]\right.$ , $CH_{3}COOC_{3}H_{7}\left[\right.rate=r_{3}\left]\right.$

• A. $r_{1}>r_{2}>r_{3}$
• B. $r_{1} < r_{2} < r_{3}$
• C. $r_{1} < r_{2}>r_{3}$
• D. $r_{1}>r_{2} < r_{3}$

Answer 1

Answer: (A)

$r_{1}>r_{2}>r_{3}$ ,

Rate of hydrolysis decreases with increase in size of alkyl group