NEET Physics: Behaviour of Perfect Gas and Kinetic Theory — MCQ Test 14

Q6. A gas occupies 89.6 litres at STP. How many moles are present? (Molar volume at STP = 22.4 litres)

Q7. What is the temperature at which the average translational kinetic energy of a gas molecule is \(1.035 \times 10^{-20} \, \text{J}\)? (\(k_B = 1.38 \times 10^{-23} \, \text{J K}^{-1}\))

Q8. The mean free path of a gas molecule is \(3.0 \times 10^{-6} \, \text{m}\) at 0.25 atm. What will it be at 1 atm if temperature remains constant?

Q9. What is the total internal energy of 2 moles of a monatomic gas at 400 K? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

Q10. A gas has a \(C_p\) of \(35.4 \, \text{J mol}^{-1} \text{K}^{-1}\). What is its \(C_v\)? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

NEET PhysicsBehaviour of Perfect Gas and Kinetic Theory

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The rms speed of oxygen molecules is 482 m/s at 300 K. What is the rms speed of methane molecules at the same temperature? (Molecular mass: \(O_2 = 32 \, \text{u}\), \(CH_4 = 16 \, \text{u}\))

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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 Molecules, Temperature, Molecular, Nitrogen, Pressure, and Decreases.

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. The rms speed of oxygen molecules is 482 m/s at 300 K. What is the rms speed of methane molecules at the same temperature? (Molecular mass: \(O_2 = 32 \, \text{u}\), \(CH_4 = 16 \, \text{u}\))

  • A. 482 m/s
  • B. 600 m/s
  • C. 682 m/s
  • D. 800 m/s

Q2. A gas mixture has equal masses of helium and nitrogen at 300 K. What is the ratio of their rms speeds? (Atomic mass: He = 4 u, \(N_2 = 28 \, \text{u}\))

  • A. 1:2.65
  • B. 1:1
  • C. 2.65:1
  • D. 7:1

Q3. What is the volume of 0.5 moles of an ideal gas at 2 atm and 627°C? (\(R = 8.31 \, \text{J mol}^{-1} \text{K}^{-1}\))

  • A. 15.0 litres
  • B. 18.5 litres
  • C. 20.0 litres
  • D. 22.5 litres

Q4. The rms speed of nitrogen molecules is 516 m/s at 300 K. What will it be at 600 K? (Molecular mass of \(N_2 = 28 \, \text{u}\))

  • A. 600 m/s
  • B. 729 m/s
  • C. 800 m/s
  • D. 1000 m/s

Q5. A gas at 1.5 atm and 300 K has a volume of 18 litres. If the pressure decreases to 0.75 atm at constant temperature, what is the new volume?

  • A. 18 litres
  • B. 24 litres
  • C. 36 litres
  • D. 48 litres

+ 5 more questions in the actual test

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