SELECT * FROM question_mgmt as q WHERE id=1872 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=60 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Explain the terms with suitable examples:

(i) Alcosol

(ii) Aerosol

(iii) Hydrosol

Answer:

(i) Alcosol: A colloidal solution having alcohol as the dispersion medium and a solid substance as the dispersed phase is called an alcosol. For example: colloidal sol of cellulose nitrate in ethyl alcohol is an alcosol.

(ii) Aerosol: A colloidal solution having a collection of solid particles or liquid droplets dispersed in air is called an aerosol. For example: fog, smoke, etc.

(iii) Hydrosol: A colloidal solution having water as the dispersion medium and a solid as the dispersed phase is called a hydrosol. For example: starch sol or gold sol.


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