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Kinetic Theory — NEET Physics MCQs

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

30questions
10/14/6easy / medium / hard
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Sample questions from this chapter

Under which conditions does a real gas most closely approach ideal behaviour?
  1. Low pressure and high temperature ✓
  2. High pressure and low temperature
  3. High pressure at every temperature
  4. Near condensation only
Answer: A. At low pressure and high temperature molecules are far apart and interaction effects are relatively negligible.
Why not B: Crowding and low thermal energy make intermolecular interactions most important.
Why not C: High pressure reduces separation and increases departures from the ideal model.
Why not D: Near condensation the neglected attractive forces strongly affect the gas.
A gas occupies 24.9 L at 1.00×10⁵ Pa and 300 K. Taking R=8.30 J mol⁻¹ K⁻¹, how many moles are present?
  1. 0.100 mol
  2. 10.0 mol
  3. 1.00 mol ✓
  4. 3.00 mol
Answer: C. n=PV/(RT)=10⁵×2.49×10⁻²/(8.30×300)=1.00 mol.
Why not A: This treats 24.9 L as 2.49×10⁻³ m³ instead of 2.49×10⁻² m³.
Why not B: This converts litres in the opposite direction, adding a factor ten.
Why not D: This divides by temperature alone and omits the gas constant.
Nitrogen at 300 K occupies 24.9 L at 2.49×10⁵ Pa. Taking R=8.30 J mol⁻¹ K⁻¹ and molar mass 28.0 g mol⁻¹, what gas mass is present?
  1. 69.7 g ✓
  2. 28.0 g
  3. 697 g
  4. 6.97 g
Answer: A. n=PV/(RT)=2.49 mol, so mass=2.49×28.0=69.7 g.
Why not B: This assumes one mole without using the stated pressure and volume.
Why not C: This treats 24.9 L as 0.249 m³, adding a factor ten to mole count.
Why not D: This treats 24.9 L as 0.00249 m³, losing a factor ten.

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

Other NEET Physics chapters

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Questions

How many NEET questions are there on Kinetic Theory?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 11 chapter.

Is this NEET Physics 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.