Question

Assertion: The molecular weight of acetic acid determined by depression in freezing point method in benzene and water was found to be different.

Reason : Water is polar and benzene is non-polar.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation:

Depression in freezing point is a colligative property which depends upon the number of palticles.

The number of particles are different in case of benzene and water because acetic acid undergoes association in benzene and dissociation in water . That is why molecular weight of acetic acid detemined by depression in freezing point method is also different.