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NEET-UG and JEE Main Chemistry · Class 12

Types of solutions and expressions of concentration — NEET & JEE Questions

Types of solutions and expressions of concentration is a topic in Solutions, a Class 12 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 12 published NEET-UG and JEE Main questions on Types of solutions and expressions of concentration, each with the marking scheme of the real paper.

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Types of solutions and expressions of concentration MCQs with solutions

10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.

  1. Question 1 · difficulty L1 · recall

    Molarity is defined as the number of moles of solute present in

    • A. one litre of solution
    • B. one kilogram of solvent
    • C. one kilogram of solution
    • D. one mole of solvent

  2. Question 2 · difficulty L2 · understanding

    Molality is expressed as

    • A. moles of solute per litre of solution
    • B. moles of solute per kilogram of solvent
    • C. grams of solute per litre of solvent
    • D. moles of solvent per kilogram of solute

  3. Question 3 · difficulty L2 · understanding

    Which concentration term is independent of temperature?

    • A. Molarity only
    • B. Molality
    • C. Volume percentage only
    • D. Moles per litre only

  4. Question 4 · difficulty L2 · understanding

    The mole fraction of a component in a solution is

    • A. moles of that component divided by total moles of all components
    • B. mass of that component divided by total volume
    • C. moles of solvent divided by litres of solution
    • D. grams of component per 100 mL only

  5. Question 5 · difficulty L3 · application

    What is the molarity of a solution containing 0.50 mol0.50\,\text{mol} solute in 250 mL250\,\text{mL} of solution?

    • A. 0.50 M
    • B. 1.0 M
    • C. 2.0 M
    • D. 4.0 M

  6. Question 6 · difficulty L3 · application

    A solution contains 0.20 mol0.20\,\text{mol} of solute dissolved in 500 g500\,\text{g} of solvent. What is its molality?

    • A. 0.10 m
    • B. 0.20 m
    • C. 0.40 m
    • D. 2.5 m

  7. Question 7 · difficulty L3 · application

    A binary solution contains 2 mol of A and 3 mol of B. What is the mole fraction of A?

    • A. 0.20
    • B. 0.40
    • C. 0.60
    • D. 0.67

  8. Question 8 · difficulty L3 · application

    A solution is prepared by dissolving 10 g of solute in 90 g of water. What is the mass percentage of solute?

    • A. 10%
    • B. 11.1%
    • C. 90%
    • D. 100%

  9. Question 9 · difficulty L4 · application

    A 2.0 M2.0\,M solution is diluted from 100 mL100\,\text{mL} to 500 mL500\,\text{mL}. What is the final molarity?

    • A. 0.20 M
    • B. 0.40 M
    • C. 1.0 M
    • D. 10 M

  10. Question 10 · difficulty L4 · application

    A solution contains 5.85 g of NaCl in enough water to make 500 mL of solution. What is its molarity? Take molar mass of NaCl as 58.5 g mol−1^{-1}.

    • A. 0.10 M
    • B. 0.20 M
    • C. 0.50 M
    • D. 1.0 M

Common mistakes in Types of solutions and expressions of concentration

Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.

  • Treats 20% as 20 g regardless of the total solution mass.
  • Uses the solvent mass correctly for molality but then uses masses instead of moles for mole fraction.

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