1.

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

Answer»

If both (A) and (R) are correct, and (R) is the correct explanation of (A)
If both (A) and (R) are correct, but (R) is the correct explanation of (A).
If (A) is correct, but (R) is incorrect.
If (A) is incorrect, but (R) is correct. S

Solution :The colours 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.


Discussion

No Comment Found

Related InterviewSolutions