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Chemistry · 2022 · 3 marks
CBSE 2022 · Region 2 · Set 1 · Q8
(a) Write three differences between Lyophobic sol and Lyophilic sol.
(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?
Marking-scheme solution
(a)
| Lyophobic Sol | Lyophilic Sol |
| Solvent repelling | Solvent loving |
| Irreversible | Reversible |
| Unstable | Stable |
| Easy to coagulate | Difficult to coagulate |
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