Select Chapter Topics:
Q. No.At equilibrium, which of the following is always zero?
1.
\(\Delta H\)
2.
\(\Delta S_{Total}\)
3.
\(\Delta S_{System}\)
4.
\(\Delta G^o\)
Subtopic: Spontaneity & Entropy |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Subtopic: 2nd & 3rd Law of Thermodynamics |
86%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
The work done when 1 mole of gas expands reversibly and isothermally from a pressure of 5 atm to 1 atm at 300 K is:
(Given log 5 = 0.6989 and R = 8.314 J K-1 mol-1)
1. zero J
2. 150 J
3. +4014.6 J
4.-4014.6 J
Subtopic: First Law of Thermodynamics |
73%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Identify correct match using Column I & Column II
| Column I | Column II | ||
| (i) | Spontaneous process | (a) | Isothermal and isobaric process |
| (ii) | \(\Delta H^\circ\) | (b) | \(\Delta H<0 \) |
| (iii) | \(\Delta T=0, \Delta P=0 \) | (c) | \(\Delta G<0 \) |
| (iv) | Exothermic process | (d) | (Bond energy of reactant) - (Bond energy of product) |
| I | II | III | IV | |
| 1. | c | d | a | b |
| 2. | b | a | c | d |
| 3. | d | b | c | d |
| 4. | a | d | b | c |
Subtopic: First Law of Thermodynamics | Spontaneity & Entropy | Gibbs Energy Change |
94%
From NCERT
JEE
Please attempt this question first.
Hints
Please attempt this question first.
| Assertion (A): | The increase in internal energy \((\Delta E ) \) for the vapourisation of one mole of water at 1 atm and 373 K is zero. |
| Reason (R): | For all isothermal processes, \(\Delta E = 0 \). |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True and (R) is False. |
| 4. | (A) and (R) both are False. |
Subtopic: Enthalpy & Internal energy |
74%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
One mole of an ideal gas at 300 K is expanded isothermally from 1 L to 10 L volume. \(\Delta U\) for this process is:
(Use R = 8.314 J K–1 mol–1)
(Use R = 8.314 J K–1 mol–1)
| 1. | 1260 J | 2. | 2520 J |
| 3. | 5040 J | 4. | 0 J |
Subtopic: First Law of Thermodynamics |
80%
From NCERT
NEET - 2022
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Choose the incorrect statement from the following :
| 1. | In a reversible process, the system and surroundings are always in equilibrium with each other. |
| 2. | Work done in free expansion > 0. |
| 3. | For adiabatic change, \(\Delta q \) = 0 . |
| 4. | For a process carried at constant pressure, \(\Delta H = q_p \) |
Subtopic: First Law of Thermodynamics | Enthalpy & Internal energy |
87%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
3 moles of helium gas at 1 bar is compressed reversibly and isothermally at 400 K to 10 bar pressure. The work done (in J) on the system is: (Given: \(R= 8.314 ~J K^{-1}~ mol^{-1}\) )
| 1. | \(2.29 \times 10^4 \) | 2. | \(2.29 \times 10^{-4} \) |
| 3. | \(-2.29 \times 10^4 \) | 4. | \(-2.29 \times 10^{-4} \) |
Subtopic: First Law of Thermodynamics |
58%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following is an incorrect statement?
| 1. | Molar heat capacity is an intensive property. |
| 2. | \(\Delta S > 0 \) for an isolated system \((\Delta U = 0 )\) |
| 3. | A bomb calorimeter is used to measure the heat absorbed at a constant volume. |
| 4. | Pressure, volume and work done on the system are state functions. |
Subtopic: First Law of Thermodynamics | Enthalpy & Internal energy |
80%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The correct expression out of the following is:
| 1. | \(\Delta U = \Delta H + \Delta n_gRT \) |
| 2. | \(C_p - C_V = R \) for 1 mole of a non-ideal gas. |
| 3. | \(\Delta S_{total} > 0 \) for a spontaneous process. |
| 4. | In \(K = ( {\Delta_r G^{0} \over RT}) \) |
Subtopic: Enthalpy & Internal energy | Spontaneity & Entropy |
70%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.