NEET Chemistry: Thermodynamics — MCQ Test 14

Q6. Calculate \(\Delta H\) for \(C(s) + 2S(s) \rightarrow CS_2(l)\) given: \(CS_2(l) + 3O_2(g) \rightarrow CO_2(g) + 2SO_2(g)\), \(\Delta H = -1076.8 \, \text{kJ/mol}\); \(C(s) + O_2(g) \rightarrow CO_2(g)\), \(\Delta H = -393.5 \, \text{kJ/mol}\); \(S(s) + O_2(g) \rightarrow SO_2(g)\), \(\Delta H = -296.8 \, \text{kJ/mol}\).

Q7. A system absorbs 600 J of heat at constant volume, and its internal energy increases by 600 J. What is the work done?

Q8. For a reaction with \(\Delta H = -50 \, \text{kJ/mol}\) and \(\Delta S = -100 \, \text{J/K}\), at what temperature does \(\Delta G = 0\)?

Q9. The heat capacity of a gas at constant volume is 20 J/mol·K. What is \(C_p\) if it is an ideal gas? (\(R = 8.314 \, \text{J/mol·K}\))

Q10. For \( CO(g) + H_2O(g) \rightarrow CO_2(g) + H_2(g) \), \( \Delta H = -41.20 \, \text{kJ/mol} \) at 298 K, what is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

NEET Chemistry — Thermodynamics

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The standard enthalpy of formation of \(CO_2(g)\) is -393.5 kJ/mol. This value refers to the formation of:

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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 Standard, Enthalpy, Formation, Calculate, Reaction, and Constant.

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 standard enthalpy of formation of \(CO_2(g)\) is -393.5 kJ/mol. This value refers to the formation of:

  • A. 1 mol of \(CO_2(g)\) from \(C(s)\) and \(O_2(g)\)
  • B. 2 mol of \(CO_2(g)\) from \(C(s)\) and \(O_2(g)\)
  • C. 1 mol of \(CO_2(g)\) from \(CO(g)\) and \(O_2(g)\)
  • D. 1 mol of \(CO_2(g)\) from \(C(g)\) and \(O_2(g)\)

Q2. Calculate \(\Delta G^\circ\) for a reaction with \(K = 2 \times 10^6\) at 298 K. (\(R = 8.314 \, \text{J/mol·K}\))

  • A. 35.96 kJ/mol
  • B. 14.51 kJ/mol
  • C. -14.51 kJ/mol
  • D. -35.96 kJ/mol

Q3. For a reaction at constant volume, the heat absorbed is equal to:

  • A. \(\Delta U\)
  • B. \(\Delta H\)
  • C. \(\Delta G\)
  • D. \(-\Delta H\)

Q4. For \( C_2H_4(g) + H_2(g) \rightarrow C_2H_6(g) \), \( \Delta H = -137.00 \, \text{kJ/mol} \) at 298 K. What is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

  • A. -137 kJ/mol
  • B. -134.5 kJ/mol
  • C. -139.5 kJ/mol
  • D. -132 kJ/mol

Q5. For an ideal gas undergoing an isochoric process, which of the following is always zero?

  • A. Work done
  • B. Heat absorbed
  • C. \(\Delta U\)
  • D. \(\Delta H\)

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