Q.

Colour of colloidial solution depends on

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a

Size of collidial particles

b

All of these

c

Wavelength of light scattered

d

Shape of collidial particles

answer is D.

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Detailed Solution

The colour of a colloidal solution depends upon the size of colloidal particles present in it. Larger particles absorb the light of longer wavelength and therefore, transmit light of shorter wavelength. For example, a silver having particles of size 150 nm appears violet whereas, that having particles of size 60 nm appears orange yellow.

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