NEET Chemistry: Thermodynamics — MCQ Test 20

Q6. For an ideal gas (\( \gamma = 1.4 \)) compressed adiabatically from 20 L to 5 L at 400 K, calculate \( \Delta U \) if \( C_v = 20.785 \, \text{J/mol·K} \). (1 mol gas)

Q7. A system at constant pressure releases 800 J of heat and contracts by 0.3 L against 2 atm. What is \( \Delta U \)? (1 atm·L = 101.325 J)

Q8. Calculate the bond enthalpy of \(H-H\) in \(H_2(g)\) given \(\Delta H_f (H,g) = 218 \, \text{kJ/mol}\).

Q9. For an ideal gas (\( \gamma = 1.4 \)) expanding adiabatically from 6 L to 12 L at 500 K, calculate the work done if \( C_v = 20.785 \, \text{J/mol·K} \). (1 mol gas)

Q10. A system undergoes a process where 500 J of heat is released, and 300 J of work is done by the system. What is the change in internal energy (\(\Delta U\))?

NEET Chemistry — Thermodynamics

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For a reaction with \( \Delta H = 75.00 \, \text{kJ/mol} \) and \( \Delta S = 250.0 \, \text{J/K} \), what is \( \Delta G \) at 350 K?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Thermodynamics. 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 Reaction, Following, Undergoing, Irreversible, Adiabatic, and Expansion.

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. For a reaction with \( \Delta H = 75.00 \, \text{kJ/mol} \) and \( \Delta S = 250.0 \, \text{J/K} \), what is \( \Delta G \) at 350 K?

  • A. 87.5 kJ/mol
  • B. 75 kJ/mol
  • C. 12.5 kJ/mol
  • D. -12.5 kJ/mol

Q2. Which of the following is true for an ideal gas undergoing an irreversible adiabatic expansion against constant external pressure?

  • A. \(\Delta U < 0\)
  • B. \(\Delta H = 0\)
  • C. \(\Delta S = 0\)
  • D. \(q > 0\)

Q3. What is the standard enthalpy of formation of \(O_2(g)\) at 298 K?

  • A. 0 kJ/mol
  • B. 33.2 kJ/mol
  • C. -285.8 kJ/mol
  • D. 90 kJ/mol

Q4. A spontaneous process is characterized by:

  • A. \(\Delta G < 0\)
  • B. \(\Delta H > 0\)
  • C. \(\Delta S < 0\)
  • D. \(\Delta U > 0\)

Q5. A gas absorbs 1200 J of heat at constant pressure, and its volume increases by 0.5 L against 2 atm. What is \( \Delta U \)? (1 atm·L = 101.325 J)

  • A. 1200 J
  • B. 1098.7 J
  • C. 1301.3 J
  • D. 998.7 J

+ 5 more questions in the actual test

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