NEET Physics: Behaviour of Perfect Gas and Kinetic Theory — MCQ Test 17

Q6. A gas occupies 44.8 litres at STP. How many moles are present? (Molar volume at STP = 22.4 litres)

Q7. A gas at 2 atm and 300 K occupies 20 litres. If the pressure is increased to 4 atm at constant temperature, what is the new volume?

Q8. The mean free path of a gas is \(3 \times 10^{-7} \, \text{m}\) with a number density of \(3 \times 10^{25} \, \text{m}^{-3}\). What is the molecular diameter?

Q9. A mixture of 0.4 moles of helium and 0.6 moles of nitrogen is at 400 K in a 25-litre container. What is the total pressure? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

Q10. A solid has a molar specific heat capacity of \(24.9 \, \text{J mol}^{-1} \text{K}^{-1}\). How many degrees of freedom per atom does it have? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

NEET PhysicsBehaviour of Perfect Gas and Kinetic Theory

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What is the time between collisions for a gas molecule with a mean free path of \(1.5 \times 10^{-7} \, \text{m}\) and average speed of 450 m/s?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Behaviour of Perfect Gas and Kinetic Theory. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Collisions, Molecule, Specific, Constant, Pressure, and Polyatomic.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. What is the time between collisions for a gas molecule with a mean free path of \(1.5 \times 10^{-7} \, \text{m}\) and average speed of 450 m/s?

  • A. \(2.0 \times 10^{-10} \, \text{s}\)
  • B. \(3.33 \times 10^{-10} \, \text{s}\)
  • C. \(4.5 \times 10^{-10} \, \text{s}\)
  • D. \(6.0 \times 10^{-10} \, \text{s}\)

Q2. The molar specific heat at constant pressure for a polyatomic gas with 2 vibrational modes is: (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

  • A. 33.24 J mol⁻¹ K⁻¹
  • B. 41.55 J mol⁻¹ K⁻¹
  • C. 49.86 J mol⁻¹ K⁻¹
  • D. 58.17 J mol⁻¹ K⁻¹

Q3. A gas at 3 atm and 300 K has a volume of 10 litres. If the temperature rises to 900 K at constant pressure, what is the new volume?

  • A. 15 litres
  • B. 20 litres
  • C. 25 litres
  • D. 30 litres

Q4. What is the volume of 0.3 moles of an ideal gas at 2.5 atm and 127°C? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

  • A. 3.0 litres
  • B. 3.95 litres
  • C. 4.5 litres
  • D. 5.0 litres

Q5. The rms speed of a gas is 350 m/s at 175 K. At what temperature will the rms speed be 700 m/s?

  • A. 350 K
  • B. 525 K
  • C. 700 K
  • D. 875 K

+ 5 more questions in the actual test

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