✓ 3 MARKS
Numericals
🔥 APPEARED IN 3 BOARD SETS
Answer the following questions :
(a) Why is direct current (DC) not used to measure the resistance of an ionic solution ?
(b) Why are the products of electrolysis different for the electrolysis of aqueous solution of $ ext{AgNO}_3$ with silver electrodes and electrolysis of aqueous solution of $ ext{AgNO}_3$ with platinum electrodes ?
(c) Why are magnesium blocks fixed to the iron pipelines carrying water ?
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2026 | Series 56-4 | Set 1 | Question 24 |
| CBSE 2026 | Series 56-4 | Set 2 | Question 25 |
| CBSE 2026 | Series 56-4 | Set 3 | Question 27 |
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)