Home
Class 12
CHEMISTRY
Assertion:Aqueous gold sol is red in col...

Assertion:Aqueous gold sol is red in colour. Reason:The colour arises due to scattering of light by colloidal gold particles.

A

If both (A) and (R) are correct, and (R) is the correct explanation of (A)

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A)

C

If (A) is correct, but (R) is incorrect

D

If (A) is incorrect, but (R) is correct

Text Solution

Verified by Experts

The correct Answer is:
A
The colour is due to scattering. It depends upon the size of particles. Finest gold sol has red colour. As the size of the particles increases, it becomes purple then blue and finally golden yellow.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Colloidal solution is electrically neutral. Reason : Due to similar nature of the charge carried by the particles, they repel each other and do not combine to form bigger particles.

Assertion : Collodial sols scatter light while true solutions do not. Reason : The particles in the collodial sol move much slower than that of the true solution.

Which of the,following statements is incorrect? Colloidal gold is used for intramuscular injection, Colloidal solution of latex is used in preparation of rubber, Colloidal solution of latex is used in preparation of rubber, Tannin used in leather industry contains positively charged colloidal particles

The protective power of a lyophilic sol is : Hardy - schulze rule, propotional to the quantity of electrical charge on it, measured in terms of gold number, determined by the size of its colloidal particles

Which component colour in white light does undergo maximum scattering ?