MCQ
What does not change on changing temperature
- AMole fraction
- BNormality
- CMolality
- ✓Both $(a)$ and $ (c)$
$\frac{ n _{\text {solute }}}{ W _{\text {solvent }}} W _{\text {solvent }}$ is the mass of solvent which is independent of temperature.
Normality is given by $N =\frac{ n _{\text {eq }} \text { of solvent }}{ V _{\text {solution }}}$
Here, it is dependent on volume which is temperature-dependent.
Mole fraction is dependent on the amount of substance which is temperature independe:
Therefore, Molality and mole fraction are temperature independent.
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(Rounded off to the nearest integer) [Given : Atomic weight in $g\, mol ^{-1}- Na : 23$; $N : 14 ; O : 16]$