A) primary alcohol
B) secondary alcohol
C) tertiary alcohol
D) methane
Correct Answer: C
Solution :
Lucas reagent is a mixture of anhy. \[ZnC{{l}_{2}}\] and cone. \[\text{HCl}\text{.}\]It is used to distinguish the primary, secondary and tertiary alcohols. \[\underset{(Tertiary\,alcohol)}{\mathop{R-\underset{R}{\overset{R}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,OH+HCl}}\,\xrightarrow[\text{at}\,\text{room}\,\text{temp}\text{.}]{\text{anhy}\text{.ZnC}{{\text{l}}_{\text{2}}}}\] \[R-\underset{R}{\overset{R}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-Cl+\underset{(water)}{\mathop{{{H}_{2}}O}}\,\left[ \begin{align} & \text{while} \\ & \text{turbidity} \\ & \text{immediately} \\ \end{align} \right]\] Secondary alcohols give white turbidity within 1-2 minute and primary alcohols give white turbidity only on heating.
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