An unknown alcohol with the molecular formula C ₄ H ₁₀ O is treated with Lucas reagent at room temperature. It produces turbidity immediately. The IUPAC name of the unknown alcohol is:

Step-by-step solution

The Lucas test is used to distinguish primary, secondary, and tertiary alcohols. The reagent is a mixture of concentrated HCl and anhydrous ZnCl ₂ . The formation of turbidity is due to the formation of an insoluble alkyl chloride. Tertiary alcohols react immediately to form turbidity, secondary alcohols take about 5 minutes, and primary alcohols do not produce turbidity at room temperature. Since the unknown alcohol ( C ₄ H ₁₀ O ) produces turbidity immediately, it must be a tertiary alcohol. Among the structural