Question

what is observed when size of the finest gold sol particles increases in the gold sol

Answer 1

On dissolution a large no. of gold particles agitate.Thus the size of the finest gold sol particles increases in the gold.A large no. of gold atoms aggregate together to form species having size in the colloidal range(1-1000nm)



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Answer 2

Answer: Finest gold sol is yellow in colour, as the size increases it appears purple,then blue and finally golden.

Explanation: The colour of colloidal solution depends upon the wavelength of light scattered by colloidal particles which in turn depends on size and nature of the colloidal particle.