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Chemistry · Some Basic Concepts of Chemistry (Mole Concept) + Stoichiometry

JEE Main 2024 — 27 January, Shift 2 — Question 70

The quantity which changes with temperature is:

  1. Option A:

    Molarity

    Correct
  2. Option B:

    Mass percentage

  3. Option C:

    Molality

  4. Option D:

    Mole fraction

Answer: A

Step-by-step solution

Molarity, M=moles of solutevolume of solution\mathrm{M = \dfrac{moles\ of\ solute}{volume\ of\ solution}} Volume changes with temperature, so molarity changes.

Mass percentage =mass of solutemass of solution\mathrm{= \dfrac{mass\ of\ solute}{mass\ of\ solution}} Mass does not change with temperature.

Molality =moles of solutemass of solvent\mathrm{= \dfrac{moles\ of\ solute}{mass\ of\ solvent}} Mass does not change with temperature.

Mole fraction =moles of componenttotal moles\mathrm{= \dfrac{moles\ of\ component}{total\ moles}} Number of moles does not change with temperature. Thus, the correct option is A.

Answer key and solution verified before publishing.

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Exam
JEE Main 2024
Paper
27 January, Shift 2
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry (Mole Concept) + Stoichiometry
Topic
Concentration Terms and Their Interconversion

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