MP Board · Class 12 · Chemistry · SolutionsWhich of the following concentration terms is independent of temperature?
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Step-by-Step Solution
The correct option is Molality.
Explanation:
- Molality ($m$) is defined as the number of moles of solute dissolved in $1 \text{ kg}$ ($1000 \text{ g}$) of the solvent. Since it involves masses of both solute and solvent, and mass does not change with temperature, molality is independent of temperature.
- On the other hand, Molarity, Normality, and Formality involve volume of the solution. Since volume changes with a change in temperature (due to thermal expansion or contraction), these terms are temperature-dependent.
Detailed Options Breakdown
Option : Molarity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.
Option 1: Molality (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Normality
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.
Option 3: Formality
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.
💡 Study Guide: This question tests core syllabus concepts from Solutions. For formulas, key summaries, and mock exam reference guides, read the full Solutions Revision Notes.