NEET Physics: Thermodynamics — MCQ Test 2

Q6. In an isobaric process, \( 0.8 \, \text{moles} \) of an ideal gas expand from \( 6 \, \text{L} \) to \( 12 \, \text{L} \) at \( 350 \, \text{K} \). What is the work done by the gas? (\( R = 8.3 \, \text{J mol}^{-1} \text{K}^{-1} \))

Q7. A gas expands isothermally at \( 400 \, \text{K} \) absorbing \( 800 \, \text{J} \) of heat. What is the change in its internal energy?

Q8. In an isochoric process, what happens to the work done by the gas?

Q9. Why does the specific heat capacity of a solid generally agree with \( 3R \) at ordinary temperatures?

Q10. Why can’t a heat engine operate with a single reservoir according to the Second Law?

Q11. Which of the following statements is incorrect regarding the First Law of Thermodynamics?

Q12. In an isobaric process, \( 0.8 \, \text{moles} \) of gas expand from \( 330 \, \text{K} \) to \( 410 \, \text{K} \). What is the heat supplied if \( C_p = 29.1 \, \text{J mol}^{-1} \text{K}^{-1} \)?

Q13. What is the change in internal energy when \( 0.1 \, \text{kg} \) of lead is heated from \( 20^\circ \text{C} \) to \( 40^\circ \text{C} \)? (Specific heat of lead = \( 127.7 \, \text{J kg}^{-1} \text{K}^{-1} \))

Q14. A system absorbs \( 700 \, \text{J} \) of heat while \( 300 \, \text{J} \) of work is done on it. What is the change in internal energy?

Q15. How much heat is required to vaporize \( 1.4 \, \text{g} \) of water at \( 100^\circ \text{C} \) and \( 1 \, \text{atm} \)? (Latent heat = \( 2256 \, \text{J/g} \))

NEET Physics — Thermodynamics

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Which of the following statements correctly describes the First Law of Thermodynamics?

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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 Thermodynamics. It contains 15 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 Following, Statements, Correctly, Describes, Thermodynamics, and Compressed.

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. Which of the following statements correctly describes the First Law of Thermodynamics?

  • A. Heat flows from cold to hot
  • B. Work is always zero
  • C. Internal energy decreases
  • D. Energy is conserved

Q2. A gas is compressed adiabatically from \( 8 \, \text{L} \) to \( 2 \, \text{L} \). If the initial pressure is \( 1 \, \text{atm} \) and \( \gamma = 1.4 \), what is the final pressure?

  • A. 4 atm
  • B. 6 atm
  • C. 7 atm
  • D. 8 atm

Q3. Why is the specific heat capacity of a substance temperature-dependent?

  • A. Constant pressure effects
  • B. Molecular energy changes
  • C. Fixed volume constraints
  • D. No work done

Q4. An ideal gas expands isothermally at \( 420 \, \text{K} \) from \( 7 \, \text{L} \) to \( 21 \, \text{L} \) with \( 0.4 \, \text{moles} \). What is the work done by the gas? (\( R = 8.3 \, \text{J mol}^{-1} \text{K}^{-1} \))

  • A. 1400 J
  • B. 1532 J
  • C. 1600 J
  • D. 1700 J

Q5. Why is the Zeroth Law fundamental to the measurement of temperature?

  • A. It defines heat transfer
  • B. It enables temperature scale consistency
  • C. It measures work done
  • D. It ensures energy conservation

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