Read the passage carefully and answer the Questions.
A homogeneous mixture of two or more than two components has uniform composition and properties. The binary solutions have two components, which may be solid, liquid or gas. The resultant solution has a larger amount of solvent and a smaller amount of solute. The amount of solute in a given amount of solvent decides the concentration of the resulting solution. The concentration can be expressed in various ways, like molarity, molality, normality and mole fraction.
Which of the following property is independent of temperature?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Mass
A quantity depends on temperature if it involves a volume, because liquids expand on heating; the mass of a substance does not change with temperature.
Mass is therefore the property that is independent of temperature.
Why the other options are incorrect
Option (1) Density — Incorrect. Density = mass/volume. The mass stays the same but the volume changes with temperature, so the density changes.
Option (3) Molarity — Incorrect. Molarity is moles of solute per litre of solution; the volume of the solution changes with temperature, so the molarity changes.
Option (4) Normality — Incorrect. Normality is gram equivalents of solute per litre of solution; like molarity, it contains the volume and so depends on temperature.
NCERT (2026-27 edition):
Expressing Concentration of Solutions – …
