Sulphur colloid is prepared by

Sulphur colloid is prepared by

A
Mechanical dispersion
B
Oxidation
C
Electrical dispersion
D
Reduction

Solution:

Sulphur sol is prepared by the oxidation of $H_{2} S$ by bromine.

${Br}_{2} + H_{2} S ⟶ 2 HBr + \underset{(Sol)}{S}$

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