NEET Chemistry: Thermodynamics — Free Practice Set 12 (10 MCQs)

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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.

0

Easy

10

Medium

0

Hard

Key concepts covered in this specific test include Calculate, Enthalpy, Following, Statements, Reversible, and Adiabatic.

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. Calculate the bond enthalpy of \(O=O\) in \(O_2(g)\) given: \(\Delta H_f^\circ (H_2O,g) = -241.8 \, \text{kJ/mol}\), \(H-H = 436 \, \text{kJ/mol}\), \(O-H = 463 \, \text{kJ/mol}\).

A. 436 kJ/mol
B. 926 kJ/mol
C. 496.4 kJ/mol
D. 241.8 kJ/mol

Q2. Which of the following statements is true for a reversible adiabatic expansion of an ideal gas?

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

Q3. For an ideal gas expanding irreversibly against a constant external pressure of 1 atm from 2 L to 5 L, calculate the work done. (1 atm·L = 101.3 J)

A. -303.9 J
B. 303.9 J
C. -607.8 J
D. 101.3 J

Q4. For \( N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \), \( \Delta H = -92.20 \, \text{kJ/mol} \) at 298 K. What is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

A. -87.2 kJ/mol
B. -92.2 kJ/mol
C. -97.2 kJ/mol
D. -82.3 kJ/mol

Q5. Calculate \(\Delta S_{total}\) when 2 mol of water vapor condenses at 373 K if \(\Delta H_{vap} = 40.79 \, \text{kJ/mol}\).

A. 218.8 J/K
B. -218.8 J/K
C. 0 J/K
D. 437.6 J/K

+ 5 more questions in the actual test

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Preview of Questions in this Test

Q1. Calculate the bond enthalpy of \(O=O\) in \(O_2(g)\) given: \(\Delta H_f^\circ (H_2O,g) = -241.8 \, \text{kJ/mol}\), \(H-H = 436 \, \text{kJ/mol}\), \(O-H = 463 \, \text{kJ/mol}\).

Q2. Which of the following statements is true for a reversible adiabatic expansion of an ideal gas?

Q3. For an ideal gas expanding irreversibly against a constant external pressure of 1 atm from 2 L to 5 L, calculate the work done. (1 atm·L = 101.3 J)

Q4. For \( N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \), \( \Delta H = -92.20 \, \text{kJ/mol} \) at 298 K. What is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

Q5. Calculate \(\Delta S_{total}\) when 2 mol of water vapor condenses at 373 K if \(\Delta H_{vap} = 40.79 \, \text{kJ/mol}\).

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NEET Chemistry: Thermodynamics — MCQ Test 12

Q6. A reaction has \(\Delta H = -200 \, \text{kJ/mol}\) and \(\Delta S = -250 \, \text{J/K}\). At what temperature does it cease to be spontaneous?

Q7. Calculate the bond enthalpy of \( N≡N \) in \( N_2(g) \) given: \( \Delta H_f^\circ (NH_3,g) = -46.10 \, \text{kJ/mol} \), \( N-H = 391.0 \, \text{kJ/mol} \), \( \Delta H_a (H,g) = 218.0 \, \text{kJ/mol} \).

Q8. The heat released when 12 g of carbon is burnt in excess oxygen is: (\(\Delta H_c = -393.5 \, \text{kJ/mol}\), molar mass of \(C = 12 \, \text{g/mol}\))

Q9. For an ideal gas (\( \gamma = 1.67 \)) compressed adiabatically from \(V_1 = 12\,\text{L}\) to \(V_2 = 3\,\text{L}\), starting at \(T_1 = 300\,\text{K}\), calculate the work done on the gas if \( C_v = 12.47 \, \text{J mol}^{-1}\text{K}^{-1} \). (Assume \(n=1\) mol.)

Q10. For the reaction \(N_2(g) + 2O_2(g) \rightarrow 2NO_2(g)\), \(\Delta H = 66.4 \, \text{kJ/mol}\) at 298 K, what is \(\Delta U\)? (\(R = 8.314 \, \text{J/mol·K}\))

NEET Chemistry — Thermodynamics

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Question Bank

Practice Tests

NEET PYQs

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About this NEET MCQ Test

Preview of Questions in this Test

Q1. Calculate the bond enthalpy of \(O=O\) in \(O_2(g)\) given: \(\Delta H_f^\circ (H_2O,g) = -241.8 \, \text{kJ/mol}\), \(H-H = 436 \, \text{kJ/mol}\), \(O-H = 463 \, \text{kJ/mol}\).

Q2. Which of the following statements is true for a reversible adiabatic expansion of an ideal gas?

Q3. For an ideal gas expanding irreversibly against a constant external pressure of 1 atm from 2 L to 5 L, calculate the work done. (1 atm·L = 101.3 J)

Q4. For \( N_2(g) + 3H_2(g) \rightarrow 2NH_3(g) \), \( \Delta H = -92.20 \, \text{kJ/mol} \) at 298 K. What is \( \Delta U \)? (\( R = 8.314 \, \text{J/mol·K} \))

Q5. Calculate \(\Delta S_{total}\) when 2 mol of water vapor condenses at 373 K if \(\Delta H_{vap} = 40.79 \, \text{kJ/mol}\).

Frequently Asked Questions

Is this practice set completely free?

Are these questions relevant for the latest NEET syllabus?

Can I view the solutions after the test?

About TopperSquare

More Chemistry Chapters for NEET

Explore More NEET Subjects

Everything you need to crack NEET