A) Reimer-Tiemann reaction
B) Tollens reagent
C) Lucas test
D) Lassaignes test
Correct Answer: C
Solution :
Lucas test consists of treating an alcohol with Lucas reagent (ie, an equimolar mixture of conc. \[HCl\] and anhydrous\[ZnC{{l}_{2}}\]), when turbidity due to the formation of insoluble alkyl chlorides is observed. \[\underset{primary\,\,alcohol}{\mathop{RC{{H}_{2}}OH}}\,\xrightarrow[+Anhyd.\,\,ZnC{{l}_{2}}]{HCl}\underset{\left( \begin{smallmatrix} no\,\,turbidity\,\,at \\ room\,temerature \end{smallmatrix} \right)}{\mathop{No\,\,reaction}}\,\] \[\underset{\text{secondary}\,\,\text{alcohol}}{\mathop{{{R}_{2}}CHOH}}\,\xrightarrow[+Anhyd.\,\,ZnC{{l}_{2}}]{HCl}\underset{\left( \begin{smallmatrix} \text{White}\,\,\text{turbidity} \\ \text{in}\,\,\text{5}\,\,\text{min} \end{smallmatrix} \right)}{\mathop{{{R}_{2}}CHCl+{{H}_{2}}O}}\,\] \[\underset{Tertiary\,\,alcohol}{\mathop{{{R}_{3}}COH}}\,\xrightarrow[Anhyd.\,\,ZnC{{l}_{2}}]{HCl}\underset{\left( \begin{smallmatrix} Turbidity\,\,appears \\ \,\,\,\,\,\,\,\,\,\,\,\,immediately \end{smallmatrix} \right)}{\mathop{{{R}_{3}}CCl+{{H}_{2}}O}}\,\]
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