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Some Basic Concepts of Chemistry question

2023 · 24 Jan · Shift 2 · Q20
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Some Basic Concepts of Chemistry question

2023 · 24 Jan · Shift 2 · Q20

JEE MainChemistrySome Basic Concepts of ChemistryNumerical+4 / −1
The number of units, which are used to express concentration of solutions from the following is ‾\underline{\hspace{2cm}}​ Mass percent, Mole, Mole fraction, Molarity, ppm, Molality
Numerical answer
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Correct answer: 5

  1. We are asked to count how many of the given terms are units used to express concentration of solutions.

  2. Given list:

    • Mass percent
    • Mole
    • Mole fraction
    • Molarity
    • ppm
    • Molality

  3. Check each one:

    1. Mass percent
      This is a concentration term. ✔️

    2. Mole
      This is a unit/measure of amount of substance, not a concentration term by itself. ✖️

    3. Mole fraction
      This is a concentration term. ✔️

    4. Molarity
      This is a concentration term. ✔️

    5. ppm
      Parts per million is used to express very low concentration. ✔️

    6. Molality
      This is a concentration term. ✔️

  4. Total number of concentration expressions:

555

  1. Therefore, the required integer answer is:

5\boxed{5}5​

  1. Comparison with stored correct answer:
    • Stored correct answer = 555
    • Derived answer = 555
    • They match.
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