Which of the following concentration units of a solution is temperatur…

Question

Which of the following concentration units of a solution is temperature-dependent?

Accepted Answer

C. {'text': 'Molarity', 'label': 'C'}

1. Molality is moles of solute per kg of solvent — mass does not change with temperature.
2. Mass percentage is w/w — mass ratio, temperature independent.
3. Mole fraction is a ratio of moles — no volume, so temperature independent.
4. Molarity is moles per LITRE of solution; volume depends on temperature, so molarity varies with T.
_Source: NCERT Class 12 Chemistry, Unit 1 "Solutions", §1.2_

Answer

{'text': 'Molality', 'label': 'A'}

Answer

{'text': 'Mass percentage', 'label': 'B'}

Answer

{'text': 'Mole fraction', 'label': 'D'}