Question

Match the following reagents with the products obtained when they react with a ketone: 

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

Hint:

In organic reactions, reagents like Calcium Hydride and Ammonium Hydroxide lead to specific products like hydrazones and hydroxones when reacting with ketones.

Answer 1

The Correct Option is A

- When Calcium Hydride (\( {CaH}_2 \)) reacts with a ketone, it produces a phenyl hydrazone. Therefore, A-IV is the correct match.
- When Ammonium Hydroxide (\( {NH}_4 {OH} \)) reacts with a ketone, it produces hydroxone. Therefore, B-III is the correct match.
- When Aniline (\( {C}_6 {H}_5 {NH}_2 \)) reacts with a ketone, it forms sodium benzoate. Therefore, C-I is the correct match.
Thus, the correct answer is option (1), A-IV, B-III, C-I.

Answer 2

Solution: To match reagents with the products obtained when they react with a ketone, we need to know how each reagent typically reacts with ketones: 

• (A) Lithium aluminum hydride (LiAlH₄): This is a powerful reducing agent that reduces ketones to secondary alcohols.
• (B) Bromine in acetic acid: This reagent is generally used for the halogenation of alpha hydrogens in ketones. The reaction is known as halogenation of ketones.
• (C) Phenyl hydrazine: This forms a phenylhydrazone with ketones, which is a type of hydrazone derivative formed when a ketone reacts with phenyl hydrazine.

Now, match each reagent with the corresponding product:

Reagent	Reaction Product
(A) LiAlH4	(IV) Secondary alcohol
(B) Bromine in acetic acid	(III) Alpha-bromo ketone
(C) Phenyl hydrazine	(I) Phenylhydrazone

Based on the above analysis, the correct matching is:

• A-IV
• B-III
• C-I

Therefore, the correct option is: A-IV, B-III, C-I.