✓ 1 MARKS
MCQ
🔥 APPEARED IN 3 BOARD SETS
When a liquid and its vapour are at equilibrium and the pressure is suddenly decreased :
A
vapour pressure of the solution increases
B
heating occurs
C
cooling occurs
D
equilibrium remains unaffected
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 56-4 | Set 1 | Question 8 |
| CBSE 2026 | Series 56-4 | Set 2 | Question 7 |
| CBSE 2026 | Series 56-4 | Set 3 | Question 9 |
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)