Identify the correct order of boiling points of the following compounds (1) CH3CH2CH2CH2OH, (2) CH3CH2CH2CHO, (3) CH3CH2CH2COOH

Question

Identify the correct order of boiling points of the following compounds (1) CH3CH2CH2CH2OH, (2) CH3CH2CH2CHO, (3) CH3CH2CH2COOH (A) 1 > 2 > 3 (B) 3 > 1 > 2 (C) 1 > 3 > 2 (D) 3 > 2 > 1

Tardigrade Admin · Accepted Answer

-COOH and -OH group form the hydrogen bond by which they have high boiling point. -COOH group shows strong hydrogen bonding so it forms dimer and have more boiling point than -OH group. While -CHO group does not form hydrogen bond. Thus the reactivity order are as 3 > 1 > 2.

Q. Identify the correct order of boiling points of the following compounds
(1) $C H_{3} C H_{2} C H_{2} C H_{2} O H,$
(2) $C H_{3} C H_{2} C H_{2} C H O,$
(3) $C H_{3} C H_{2} C H_{2} COO H$

$1 > 2 > 3$

$3 > 1 > 2$

$1 > 3 > 2$

$3 > 2 > 1$

$- COO H$ and $- O H$ group form the hydrogen bond by which they have high boiling point. $- COO H$ group shows strong hydrogen bonding so it forms dimer and have more boiling point than $- O H$ group. While $- C H O$ group does not form hydrogen bond. Thus the reactivity order are as $3 > 1 > 2.$

Q. Identify the correct order of boiling points of the following compounds (1) CH3​CH2​CH2​CH2​OH, (2) CH3​CH2​CH2​CHO, (3) CH3​CH2​CH2​COOH

1>2>3

3>1>2

1>3>2

3>2>1