Which of the following pairs would have higher boiling points ?

Explanation

(a) (II) because carbonyl group is more polar than double bond.
(b) (I) acid forms dimar due to `H-`bonding.
( c) (II) cis-compound has high dipole moment `(mu)`, so more polar than trans-compound `(mu = 0)`
(d) (I) it forms `H-`bonding1 through `H` atom in `(-NH)` group.
( e) (II) it forms `H-`bonding
(f) (II) alcohols form `H`-bonding.
(g) (II) two `(OH)` groups can form more `H-`bonding with each other.
(h) (I) alcohold form `H-`bonding
(i) (II) because of high molecular mass and large size, have larger van der Waals forces of attraction.