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(A) The Lucas reagent (a mixture of concentrated $HCl$ and anhydrous $ZnCl_2$) is used to distinguish between $1^o, 2^o$,and $3^o$ alcohols.The reacti

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Alcohols

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(A) The Lucas reagent (a mixture of concentrated $HCl$ and anhydrous $ZnCl_2$) is used to distinguish between $1^o, 2^o$,and $3^o$ alcohols.The reaction is: $R-OH + HCl \xrightarrow{ZnCl_2} RCl + H_2O$The three types of alcohols react with this reagent at different rates:$3^o$ Alcohol (immediate turbidity) > $2^o$ Alcohol (turbidity in $5-10$ minutes) > $1^o$ Alcohol (no turbidity at room temperature).

The Lucas test is used to distinguish between which of the following?

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