Assertion : If one component of a solution obeys Raoult’s law ove… - Vidyadip

MCQ

Assertion : If one component of a solution obeys Raoult’s law over a certain range of composition, the other component will not obey Henry’s law in that range.

Reason : Raoult’s law is a special case of Henry’s law.

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
✓
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.

✓

Answer

Correct option: C.

If the Assertion is correct but Reason is incorrect.

c
$\mathrm{P}_{\mathrm{s}}=\mathrm{P}_{\mathrm{A}}^{\mathrm{O}} \mathrm{x}_{\mathrm{A}}+\mathrm{P}_{\mathrm{B}}^{\mathrm{O}} \mathrm{x}_{\mathrm{B}}$

$=280 \times \frac{3}{5}+420 \times \frac{2}{5}$

$=56 \times 3+84 \times 2$

$=168+168$

$=336$

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