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Q.

Statement - I : Aqueous gold colloidal solution is red in colour
Statement - II : The colour arises due to scattering of light by colloidal gold particles.

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a

Both statements I and II are correct

b

Statement-I is correct and statement-II is incorrect

c

Statement-I is incorrect and statement-II is correct

d

Both statements I and II are incorrect

answer is A.

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Detailed Solution

Aqueous gold colloidal solution is red in colour. The colour is due to scattering. It depends upon the size of particles. Finest gold sol has red colour. As the size of the particle increases, it becomes purple and then blue and finally golden yellow.

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Statement - I : Aqueous gold colloidal solution is red in colourStatement - II : The colour arises due to scattering of light by colloidal gold particles.