• # question_answer Number of structural isomers of ${{C}_{4}}{{H}_{10}}O$ are [CPMT 1983, 84, 89, 91; MADT Bihar 1984; MNR 1984; MP PET 1997; Pb. PMT 1999; MH CET 2003] A) 3 B) 6 C) 7 D) 10

${{C}_{4}}{{H}_{10}}O$ have 7 isomers out of which 4 are alcohols and 3 are ethers. 1. $\underset{n-\text{butyl}\,\text{alcohol}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH}}\,$, 2. $\underset{\text{Sec}-\text{butyl}\,\text{alcohol}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,$ 3. $\underset{\text{Isobutyl}\,\text{alcohol}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{2}}-OH}}\,$ 4. $\underset{\text{Ter}-\text{buty}-\text{alcohol}}{\mathop{C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\underset{\underset{OH}{\mathop{|\,\,\,\,\,\,}}\,}{\overset{|\,\,\,\,\,\,}{\mathop{C\,\,-\,}}}\,}}\,C{{H}_{3}}}}\,$ 5. $\underset{\text{Diethyl}\,\text{ether}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-O-C{{H}_{2}}-C{{H}_{3}}}}\,$ 6. $\underset{\text{Methyl}\,\text{propyl}\,\text{ether}}{\mathop{C{{H}_{3}}-O-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}}}\,$ 7. $\underset{\text{Methyl}\,\text{isopropyl}\,\text{ether}}{\mathop{C{{H}_{3}}-O-CH<_{C{{H}_{3}}}^{C{{H}_{3}}}}}\,$