Question

Match the following.

Column - I	Column - II
a) When the molecular state of solute in solution is unchanged	p) The observed colligative property is normal.
b) When the solute undergoes association in solution .	q) inversely proportional to the molecular mass of the solute
c) When the solute undergoes dissociation is solution.	r) The observed colligative property is larger in magnitude.
d) A colligative property	s) The observed colligative property is smaller in magnitude

• A. A-P, B-S, C-R, D-Q
• B. A-S, B-P, C-R, D-Q
• C. A-P, B-S, C-Q, D-R
• D. A-P, B-R, C-S, D-Q

Answer 1

The correct option is A A-P, B-S, C-R, D-Q

When the molecular state of solute in solution is unchanged means neither association nor dissociation. The observed colligative property is normal. $a\to p$

Solute association means $i<1$. So, the observed colligative property is smaller in magnitude than the theoretical colligative property. $b\to s$

Solute dissociation means $i>1$. So, the observed colligative property is larger in magnitude than the theoretical colligative property. $c\to r$

no. of moles is a colligative property but molecular weight is not.
So, $n\propto \frac{1}{M.wt.}$

$\therefore$ A colligative property $\propto \frac{1}{M\cdot wt},d\to q$

Option A is correct.