JEE Main Chemistry question

Statement 1: The molecular weight of acetic acid determined by the depression in freezing point method in benzene and in water was found to be different. Statement 2: Water is polar and benzene is non-polar.

(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

In non-polar benzene, acetic acid molecules dimerise through hydrogen bonding, giving an apparent molecular weight roughly double the true value, whereas in polar water it remains largely monomeric (and may even partially dissociate),

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-143132