Q. 34

Structures of molecules of two compounds are given below :

(a) Which of the two compounds will have intermolecular hydrogen bonding and which compound is expected to show intramolecular hydrogen bonding.

(b) The melting point of a compound depends on, among other things, the extent of hydrogen bonding. On this basis explain which of the above two compounds will show higher melting point.

(c) Solubility of compounds in water depends on power to form hydrogen bonds with water. Which of the above compounds will form hydrogen bond with water easily and be more soluble in it.

Answer :

(a) Compound (I)

Compound (II)

(b) The compound (II) has a higher melting point because of the intermolecular bonding, a large number of molecules that will get attached to each other.

(c) The compound (II) will be more soluble in water because it will form hydrogen bonding with the water molecules easily. On another hand, the compound (I) has intramolecular hydrogen bonding so it will be difficult for it to combine with H₂O molecules.

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