• # question_answer Total number of isomers of ${{C}_{6}}{{H}_{14}}$ are [IIT-JEE 1987; DPMT 1983; CPMT 1991; MNR 1990; MP PET 1995; UPSEAT 2001] A) 4 B) 5 C) 6 D) 7

1. $\underset{\text{n}-\text{hexane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,$ 2. $\underset{\text{2}-\text{methyl}\,\text{pentane}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,$ 3. $\underset{\text{3}-\text{methyl}\,\text{pentane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,\,C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}}}\,$ 4. $\underset{\text{2,3}-\text{Dimethyl}\,\text{butane}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{H}_{3}}}}\,$ 5. $\underset{\text{3}-\text{methyl}\,\text{pentane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{\,\,\,C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}}}\,$