(a) Draw structure of the 2,4-dinitrophenylhydrazone of benzaldehyde. (b) Which acid of the following pair is a stronger acid? $\text{F}_3\text{C} - \text{C}_6\text{H}_4 - \text{COOH}$ or $\text{H}_3\text{C} - \text{C}_6\text{H}_4 - \text{COOH}$. (c) Write the chemical equation involved in Rosenmund's reduction. (d) Why are $\alpha$-hydrogen atoms of aldehydes and ketones acidic in nature? (e) Write a chemical test to distinguish between Benzaldehyde and Benzoic acid.

Year	Paper Code	Set	Position
CBSE 2023	Series Other	Set 1	Question 35
CBSE 2023	Series Other	Set 1	Question 33
CBSE 2023	Series Other	Set 1	Question 34

• Step 1: Stating the fundamental formula / law statement (+1 Mark)
• Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
• Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)