What is Lucas Reagent?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → $ZnCl_2$ and conc. $HCl$
Lucas reagent is a solution of anhydrous zinc chloride ($ZnCl_2$) dissolved in concentrated hydrochloric acid ($HCl$). It is a fundamental tool in organic chemistry used to differentiate between primary, secondary, and tertiary alcohols.