✓ 5 MARKS
Long Answer
🔥 APPEARED IN 3 BOARD SETS
(a) Compound A undergoes Rosenmund reduction to give compound B with molecular formula $\text{C}_7\text{H}_6\text{O}$. Compound B does not give Fehling's test but reacts with conc. $\text{NaOH}$ to give C and D. Identify A, B, C and D and write all the reactions involved. Write one chemical test to distinguish between compound B and propanone.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2023 | Series Other | Set 1 | Question 34 |
| CBSE 2023 | Series Other | Set 1 | Question 33 |
| CBSE 2023 | Series Other | Set 1 | Question 35(a) |
02 // OFFICIAL CBSE MARKING SCHEME BREAKDOWN
- 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)