✓ 3 MARKS
Numericals
🔥 APPEARED IN 3 BOARD SETS
Calculate emf of the following cell at $298\text{ K}$ :
$\text{Sn} \mid \text{Sn}^{2+} (0.001\text{ M}) \parallel \text{H}^+ (0.01\text{ M}) \mid \text{H}_{2\text{(g)}} (1\text{ bar}) \mid \text{Pt}_{\text{(s)}}$
Given : $E^\circ_{\text{Sn}^{2+}/\text{Sn}} = - 0.14\text{ V}$,
$E^\circ_{\text{H}^+/\text{H}_2} = 0.00\text{ V} [\log 10 = 1]$
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 56-2 | Set 1 | Question 23 |
| CBSE 2026 | Series 56-2 | Set 2 | Question 23 |
| CBSE 2026 | Series 56-2 | Set 3 | Question 23 |
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)