Question

The colour of colloidal solution depends upon size and shape of sol particles.

• A. True
• B. False

Answer 1

The correct option is A True

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.