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Question

Which one of the following is not a colloidal solution?

A

Smoke

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B

Ink

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C

Air

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D

Blood

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Solution

The correct option is C
Air

The colloid is a mixture in which one substance of microscopically dispersed insoluble particles are suspended throughout another substance. Blood, ink, smoke all have small particles which are suspended and dispersed throughout.

Whereas air is a mixture of different gases in different proportions along with water vapour, humidity etc.,

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