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Which of the following concentration terms is dependent on temperature?
AMolarity
BMole fraction
CMolality
DMass percentage
Answer & Solution
Correct answer: A. Molarity
1. Mass %, ppm, mole fraction and molality are all defined using masses or mole counts, which do not change with temperature.
2. Molarity is moles of solute per litre of solution, and volume of solution expands or contracts with temperature.
3. Hence molarity is a function of temperature, while the others are temperature independent.
_Source: NCERT Class 12 Chemistry Ch 1 "Solutions", p.4_
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