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The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ________. Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather

1. [5]
2. [4]
3. [6]
4. [7]

Correct answer: [5]

Solution

In this context, the colloidal systems that have 'liquid' as the dispersion medium include paints, milk, hair cream, insecticide sprays, and soap lather, totaling five systems. The other options, such as gem stones, smoke, cheese, and froth, do not fit this criterion.

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