✓ 3 MARKS
Reasoning / Why
🔥 APPEARED IN 3 BOARD SETS
(a) Write three differences between Lyophobic sol and Lyophilic sol.
OR
(b) (i) Write the dispersed phase and dispersion medium of 'milk'.
(ii) What is the cause of Brownian movement in colloidal particles ?
(iii) Why does physisorption decrease with increase in temperature ?
01 // VERIFIED BOARD OCCURRENCES
| Year | Paper Code | Set | Position |
|---|---|---|---|
| CBSE 2022 | Series 56-2 | Set 1 | Question 8 |
| CBSE 2022 | Series 56-2 | Set 2 | Question 6 |
| CBSE 2022 | Series 56-2 | Set 3 | Question 7 |
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)