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Solutions — NEET & JEE Chemistry MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

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Sample questions from this chapter

Which statement defines a solution?
  1. A homogeneous mixture of two or more components ✓
  2. A heterogeneous mixture whose particles settle
  3. A pure substance with variable composition
  4. A compound formed only by ionic bonding
Answer: A. A solution is a homogeneous mixture containing at least two components. Calling it a pure substance is the closest conceptual trap because a clear solution can look like one phase while retaining variable composition.
Why not B: A solution is uniform throughout and its components do not separate by settling.
Why not C: A pure substance has fixed composition, whereas a solution is a mixture with variable composition.
Why not D: Solution formation does not require chemical bonding or ionic components.
A solution contains 10 g glucose and 90 g water. What is the mass percentage of glucose?
  1. 9.0%
  2. 11.1%
  3. 10.0% ✓
  4. 90.0%
Answer: C. Mass percentage = 10/(10+90)×100 = 10.0%. The 11.1% trap uses solvent mass in the denominator, confusing percentage with a solute-to-solvent ratio.
Why not A: This incorrectly divides solute mass by 110 g rather than the 100 g solution mass.
Why not B: This divides by the solvent mass, 90 g, instead of total solution mass.
Why not D: This reports the water mass percentage rather than glucose percentage.
A solution contains 18.0 g glucose in 180 g water. What is its molality? Use molar mass of glucose = 180 g mol^-1.
  1. 0.556 mol kg^-1 from 0.100 mol divided by 0.180 kg ✓
  2. 0.100 mol kg^-1 by reporting the glucose mole amount
  3. 1.00 mol kg^-1 by treating the solvent mass as one kilogram
  4. 5.56 mol kg^-1 by using 0.018 kg as the solvent mass
Answer: A. Glucose moles = 18/180 = 0.100 mol and solvent mass = 0.180 kg, so m = 0.100/0.180 = 0.556 mol kg−1. The 0.100 trap stops after finding moles.
Why not B: Molality requires division by solvent mass in kilograms, not merely the solute mole amount.
Why not C: The solution contains 0.180 kg rather than one kilogram of solvent.
Why not D: The water mass is 0.180 kg, ten times the denominator used here.

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Every NCERT question in this chapter is solved, free: NCERT solutions — Solutions →

Other NEET Chemistry chapters

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Questions

How many NEET and JEE questions are there on Solutions?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET and JEE Chemistry chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.