Question

Which is having highest elevation in boiling point?

• A. $H_{2}O$
• B. Solution I
• C. Solution II
• D. Solution III

Answer 1

Answer: (D)

When nonvolatile solute is added in volatile solvent $\to$ vapour pressure of solvent decreases and $B.P$. increases
$T_{b_3}>T_{b_2}>T_{b_1}$
$T_b=$ boiling point of solution
As vapour pressure decreases $\Rightarrow B.P.$ of solution increases
So, III have minium $V.P.=$ maximum $B.P.=$ Elevation in $B.P.$