- 1(current)
Q. No.Match the following process with entropy change:
| Reaction | Entropy change | ||
| A. | A liquid vaporizes | 1. | |
| B. | Reaction is non-spontaneous at all temperatures and is positive | 2. | |
| C. | Reversible expansion of an ideal gas | 3. |
Codes:
| A | B | C | |
| 1. | 2 | 3 | 1 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 3 | 2 |
| 4. | 3 | 2 | 1 |
Subtopic: Spontaneity & Entropy |
81%
From NCERT
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NEET 2026 - Target Batch - Vital
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Match the following parameters with a description for spontaneity.
| \(\Delta r\ H^⊝\) | \(\Delta r\ S^⊝\) | \(\Delta r\ G^⊝\) | Description | ||
| A. | + | – | + | 1. | Non-spontaneous at high temperature |
| B. | – | – | + at high T | 2. | Spontaneous at all temperatures |
| C. | – | + | – | 3. | Non-spontaneous at all temperatures |
Codes:
| A | B | C | |
| 1. | 3 | 1 | 2 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 3 | 2 |
| 4. | 3 | 2 | 1 |
Subtopic: Spontaneity & Entropy |
78%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Match the statements given in column 1 with corresponding characteristics given in column II and choose the correct option:
| Column -I | Column -II | ||
| A. | Entropy of vaporization | 1. | Decreases |
| B. | K for a spontaneous process | 2. | Is always positive |
| C. | Crystalline solid state | 3. | Lowest entropy |
| D. | \(\Delta U\) in an adiabatic expansion of ideal gas | 4. | \(\Delta H_{vap} \over T_b\) |
Codes:
| Options: | A | B | C | D |
| 1. | 2,4 | 2 | 3 | 1 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 1 | 4,3 | 3 | 2 |
| 4. | 4 | 3 | 3,1 | 2 |
Subtopic: Spontaneity & Entropy | Gibbs Energy Change |
81%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Select the correct option based on statements below:
| Assertion (A): | Spontaneous process is an irreversible process and may be reversed by some external agency. |
| Reason (R): | A decrease in enthalpy is a contributing factor to spontaneity. |
| 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 |
59%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Select the correct option based on statements below:
| Assertion (A): | A liquid crystallizes into a solid and is accompanied by a decrease in entropy. |
| Reason (R): | In crystals, molecules organize in an ordered manner. |
| 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 |
84%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
The entropy change can be calculated by using the expression . When water freezes in a glass beaker, the correct statement among the following is:
| 1. | ∆ S (system) decreases but ∆ S (surroundings) remains the same. |
| 2. | ∆ S (system) increases but ∆ S (surroundings) decreases. |
| 3. | ∆ S (system) decreases but ∆ S (surroundings) increases. |
| 4. | ∆ S (system) decreases but ∆ S (surroundings) also decreases. |
Subtopic: Spontaneity & Entropy |
61%
From NCERT
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NEET 2026 - Target Batch - Vital
Which of the following is not correct?
1. is zero for a reversible reaction.
2. is positive for a spontaneous reaction.
3. is negative for a spontaneous reaction.
4. is positive for a non-spontaneous reaction.
Subtopic: Spontaneity & Entropy |
84%
From NCERT
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The processes among the following that occur spontaneously are :
| (a) | The flow of heat from a colder to a warmer body. |
| (b) | Gas in a container contracting into one corner. |
| (c) | Gas expanding to fill the available volume. |
| (d) | Burning carbon in oxygen to give carbon dioxide. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Subtopic: Spontaneity & Entropy |
77%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
- 1(current)
Q. No.
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