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Q. No.What is the change in Gibbs free energy (ΔG) for the melting of three moles of water at 0°C?
1.
Zero
2.
Positive
3.
Negative
4.
Unpredictable
Subtopic: Gibbs Energy Change |
Level 3: 35%-60%
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| Assertion (A): | Decrease in free energy causes a spontaneous reaction. |
| Reason (R): | Spontaneous reactions are invariably exothermic reactions. |
| 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 but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Spontaneity & Entropy |
Level 3: 35%-60%
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Consider the given two statements:
| Statement I: | A molar property \(\left(X_{\mathrm{m}}\right) \) is the value of an extensive property \(\left(X_{\mathrm{}}\right)\) of the system for 0.1 mol of the substance. |
| Statement II: | If n is the amount of matter, \(X_{\mathrm{m}}=\chi / \mathrm{n}\) is independent of the amount of matter. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is incorrect |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Classification of System, Extensive & Intensive Properties |
Level 3: 35%-60%
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Consider the two given statements:
| Assertion (A): | Heat and work are "definite quantities". |
| Reason (R): | Heat and work are not properties of a system their values depend on the path of the process and vary accordingly. |
| 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 but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Thermodynamics' Properties and process |
Level 3: 35%-60%
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In which of the following case, does the entropy decrease?
1. Boiling of egg
2. Combustion of benzene at 27oC
3. Combustion of benzene at 127oC
4. Dissolution of sugar in water
Subtopic: Spontaneity & Entropy |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
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Select the correct option based on statements below:
| Statement I: | Total enthalpy change of a multistep process is the sum of ∆H1 + ∆H2 + ∆H3 + . . . |
| Statement II: | When heat is absorbed by the system, the sign of q is taken to be negative. |
| 1. | Statement I is correct; Statement II is correct. |
| 2. | Statement I is correct; Statement II is incorrect. |
| 3. | Statement I is incorrect; Statement II is correct. |
| 4. | Statement I is incorrect; Statement II is incorrect. |
Subtopic: First Law of Thermodynamics |
Level 3: 35%-60%
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Based on the reactions, ascertain the valid algebraic relationship:
| 1. | x = y | 2. | x = 2y |
| 3. | x > y | 4. | x < y |
Subtopic: Enthalpy & Internal energy |
Level 3: 35%-60%
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
| Assertion (A): | The heat absorbed during the isothermal expansion of an ideal gas against a vacuum is zero. |
| Reason (R): | The volume occupied by the molecules of an ideal gas is zero. |
| 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 but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Enthalpy & Internal energy |
Level 3: 35%-60%
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| Assertion (A): | Enthalpy and entropy of any elementary substance in the standard states are taken as zero. |
| Reason (R): | At absolute zero, particles of the perfectly crystalline substance become completely motionless. |
| 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 but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: 2nd & 3rd Law of Thermodynamics |
Level 4: Below 35%
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