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1. Solution and colligative properties — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry1. Solution and colligative properties1 Mark
MCQ
What does not change on changing temperature
  • A
    Mole fraction
  • B
    Normality
  • C
    Molality
  • ✓
    Both $(a)$ and $ (c)$
✓

Answer

Correct option: D.
Both $(a)$ and $ (c)$
d
Molality is given by $m =$

$\frac{ n _{\text {solute }}}{ W _{\text {solvent }}} W _{\text {solvent }}$ 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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