(A) The colour of colloidal solutions depends on the size of the colloidal particles. For gold sol,the colour varies with the particle size; very fine

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

(A) The colour of colloidal solutions depends on the size of the colloidal particles. For gold sol,the colour varies with the particle size; very fine gold sol is red in colour. This colour arises due to the scattering of light by the colloidal gold particles.

Class 12 Chemistry Surface Chemistry Colloids, Emulsion, Gel and Their properties with application

Medium

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

AIIMS 2004 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.