In which case Raoult's law is not applicable - Vidyadip

MCQ

In which case Raoult's law is not applicable

✓
$1M\,NaCl$
B
$1 M$ urea
C
$1 M $ glucose
D
$1 M $ sucrose

✓

Answer

Correct option: A.

$1M\,NaCl$

a
Raoult's law is not applicable if the total number of particles of solute changes in the solution due to association or dissociation.

Urea, glucose and sucrose are the non-electrolytes. They cannot dissociate into ions.

$NaCl$ dissociates into $Na ^{+}$ ions and $Cl ^{-}$ ions.

Hence, option $A$ is correct.

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