Question

False statement regarding isopentane is
A. It has $3$ $C{{H}_{3}}$ group
B. It has one $C{{H}_{2}}$ group
C. It has one $CH$ group
D. It has a carbon atom which is not bonded to hydrogen

Answer 1

Isopentane is made from two words iso and pentane. Further pentane is made from two words pent and ane where pent signifies the number of carbon atoms and ane signifies the functional group.

Complete step by step answer:
Pentane is a carbon chain having five carbon atoms since pent is the prefix for five.
Iso is a prefix used when all the carbons are in a chain except one or the second carbon has a methyl inside the chain. Therefore, isopropane is a straight chain of four carbons and a methyl side chain on the second carbon.
Isopropane can also be called as $2$-methylbutane having a formula of ${{C}_{5}}{{H}_{12}}$ and it’s molecular mass is $72.15g/mol$ or simply $72g/mol$ .
Isopentane is volatile, extremely flammable liquid at room temperature and normal pressure.
Isopentane is generally used in reactions to form industrial substances and in manufacture of chlorinated derivatives.
The condensed structure of isopentane is ${{(C{{H}_{3}})}_{2}}-CH-C{{H}_{2}}-C{{H}_{3}}$ having three $C{{H}_{3}}$ groups, one $C{{H}_{2}}$ group, one $CH$ group and no carbon without hydrogen atom therefore, the fourth statement that it has a carbon atom which is not bonded to hydrogen is false.

Note: You can also refer to it’s line structure for ease and isopentane is one of the simplest structures in chemistry which follows almost the same standard properties and reacts the same way as most the elements.