✓ 3 MARKS
Numericals
🔥 APPEARED IN 3 BOARD SETS
A first order reduction takes 30 minutes for 75% decomposition. Calculate $t_{1/2}$.
Given : $[\log 2 = 0\cdot 3, \, \log 3 = 0\cdot 48, \, \log 4 = 0\cdot 6, \, \log 5 = 0\cdot 7]$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2022 | Series 56-2 | Set 1 | Question 7 |
| CBSE 2022 | Series 56-2 | Set 2 | Question 8 |
| CBSE 2022 | Series 56-2 | Set 3 | Question 8 |
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)