For increase in difference between P_A^ o and P_A - Vidyadip

MCQ

For increase in difference between $P_A^ o$ and $P_A$

A
boiling point and freezing point both increase
B
boiling point and freezing point both decrease
✓
boiling point increase, freezing point decrease
D
boiling point decrease, freezing point increase

✓

Answer

Correct option: C.

boiling point increase, freezing point decrease

c
$\mathrm{P}_{\mathrm{A}}=\mathrm{X}_{\mathrm{A}} \times \mathrm{P}_{\mathrm{A}}^{0}$

$\mathrm{X}_{\mathrm{A}}$ decreases, $\therefore$ Solute increases

$\uparrow \Delta \mathrm{T}_{\mathrm{b}}=\mathrm{m} \uparrow \mathrm{k}_{\mathrm{b}}$

$\uparrow \Delta \mathrm{T}_{\mathrm{f}}=\uparrow \mathrm{m} \mathrm{k}_{\mathrm{f}}$

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