✓ 1 MARKS
Assertion-Reason
🔥 APPEARED IN 3 BOARD SETS
Assertion (A) : The molecularity of the given reaction is 2
$2\text{HI} \longrightarrow \text{H}_2 + \text{I}_2$
Reason (R) : Two molecules of the reactants are involved in simultaneous collision between them.
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 56-2 | Set 1 | Question 13 |
| CBSE 2026 | Series 56-2 | Set 2 | Question 16 |
| CBSE 2026 | Series 56-2 | Set 3 | Question 14 |
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)