A) \[C{{H}_{3}}-C{{H}_{2}}-CH(OH)C{{H}_{3}}\]
B) \[{{(C{{H}_{3}})}_{2}}CH-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-{{C}_{2}}{{H}_{5}}\]
C) \[C{{H}_{3}}-\underset{O}{\mathop{\underset{|\,\,|}{\mathop{C}}\,}}\,-OC{{H}_{3}}\]
D) \[{{(C{{H}_{3}})}_{3}}CC{{H}_{2}}OH\]
Correct Answer: A
Solution :
The compound containing \[C{{H}_{3}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-\]and \[-\overset{OH}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]groups on heating with sodium hypoiodite \[(NaOI)\]or \[{{I}_{2}}\] with aq. NaOH or aq. \[N{{a}_{2}}C{{O}_{3}}\]gives yellow ppt. of iodoform and the reaction is known as iodoform. \[{{H}_{3}}C-C{{H}_{2}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}+O{{I}^{-}}\xrightarrow{{}}\] \[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-C{{H}_{3}}+{{I}^{-}}+{{H}_{2}}O\] \[C{{H}_{2}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-C{{H}_{3}}+O{{I}^{-}}\xrightarrow{{}}\] \[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{|\,|}{\mathop{C}}\,}}\,-C{{I}_{3}}+\bar{O}H\] \[C{{H}_{3}}C{{H}_{2}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-C{{I}_{3}}+HONa\] \[C{{H}_{3}}-C{{H}_{2}}-\overset{O}{\mathop{\overset{|\,\,|}{\mathop{C}}\,}}\,-ONa+\underset{\text{iodoform}}{\mathop{CH{{I}_{3}}}}\,\]
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