(a) (i) How will you bring about the following conversions : (I) Bromobenzene to 1-phenylethanol (II) Benzene to m-nitroacetophenone (ii) An organic compound with the molecular formula $\text{C}_8\text{H}_8\text{O}$ forms 2,4-DNP derivative, reduces Tollens' reagent and undergoes Cannizzaro reaction. On vigorous oxidation with acidic or alkaline $\text{KMnO}_4$ it gives Benzene-1,2-dicarboxylic acid. Identify the compound and write the products when it undergoes Cannizzaro reaction. (iii) Arrange the following compounds in increasing order of their acid strength : $\text{C}_6\text{H}_5\text{COOH}, \text{O}_2\text{N} - \text{CH}_2 - \text{COOH}, \text{CF}_3 - \text{COOH}, \text{HCOOH} OR (b) (i) Write the products formed when benzaldehyde reacts with the following reagents : (I) 2,4-Dinitrophenylhydrazine (II) Acetophenone in the presence of dilute $\text{NaOH}$ followed by heating (ii) Give reasons for the following : (I) Benzoic acid does not undergo Friedel-Crafts reaction. (II) Carboxylic acids have higher boiling point than alcohols of comparable molecular mass. (iii) Write simple chemical test to distinguish between propanal and propanone.

Year	Paper Code	Set	Position
CBSE 2026	Series 56-4	Set 1	Question 32
CBSE 2026	Series 56-4	Set 2	Question 33
CBSE 2026	Series 56-4	Set 3	Question 31

• 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)