#### Identify the unsaturated compounds from the following (i) Propane (ii) Propene (iii) Propyne (iv) Chloropropane (a) (i) and (ii)       (b) (ii) and (iv) (c) (iii) and (iv)     (d) (ii) and (iii)

Solution:

A hydrocarbon in which the two carbon atoms are connected by a ‘double bond’ or ‘triple bond' are categorized as unsaturated hydrocarbon

(i) Propane: $C_3H_8$

(ii) Propene: $C_3H_6$

(iii) Propyne: $C_3H_4$

$CH_3-C\equiv CH$

(iv) Chloropropane: $C_3H_7Cl$

So, Propene and propyne has double bonds and triple bonds respectively which means they are unsaturated.

Propane and chloropropane are saturated hydrocarbons which contain only single bonds.

Therefore, option (d) is correct.