JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Statement 1: Aqueous gold colloidal solution is red in colour. Statement 2: The colour arises due to scattering of light by colloidal gold particles.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

A finely divided aqueous gold sol does appear red, so Statement 1 is true. The colour of a colloidal solution depends on the wavelength of light scattered by its dispersed particles, which in turn depends on particle size and nature;

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Question ID VK-144809