Match List I with List II

Choose the correct answer from the options given below:

A-IV, B-I, C-III, D-II

The correct answer is option 3. A-IV, B-I, C-III, D-II.

Let us look at the functions of the given reagents

A. \(HCl-ZnCl_2\) (Lucas reagent) - This reagent is used to classify alcohols based on their reactivity. It reacts with tertiary alcohols relatively quickly, forming alkyl chlorides. Secondary alcohols react more slowly, while primary alcohols do not react under normal conditions.

B. \(LiAlH_4\) - Lithium aluminum hydride is a strong reducing agent commonly used in organic chemistry. It can reduce various functional groups such as aldehydes, ketones, carboxylic acids, esters, and amides to their respective alcohols.

C. \(PCC\) (Pyridinium chlorochromate) - PCC is an oxidizing agent commonly used in organic synthesis. It selectively oxidizes primary alcohols to aldehydes and secondary alcohols to ketones without further oxidation to carboxylic acids.

D. Ethyl magnesium bromide (Grignard reagent) - This is a very versatile organometallic reagent used in organic synthesis. It acts as a powerful nucleophile, attacking various electrophiles like carbonyl compounds (aldehydes, ketones, esters, etc.), to form carbon-carbon bonds.

So, the matches are:

A-IV (Lucas reagent is used for classification, not as a reducing agent),

B-I (\(LiAlH_4\) is indeed a reducing agent),

C-III (PCC is an oxidizing agent),

D-II (Grignard reagents are used for carbon-carbon bond formation).

Therefore, the correct answer is 3. A-IV, B-I, C-III, D-II.