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Q. No.Match the terms in List I with their corresponding descriptions in List II:
| List I (Term) | List II (Description) | ||
| A. | Adiabatic process | i. | At constant temperature |
| B. | Isolated system | ii. | No transfer of heat |
| C. | Isothermal change | iii. | Heat |
| D. | Path function | iv. | No exchange of energy and matter |
Codes:
| A | B | C | D | |
| 1. | ii | iv | i | iii |
| 2. | iii | iv | i | ii |
| 3. | iv | iii | i | ii |
| 4. | iv | ii | i | iii |
Subtopic: First Law of Thermodynamics | Classification of System, Extensive & Intensive Properties |
85%
Level 1: 80%+
Hints
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%
Level 1: 80%+
Hints
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 |
79%
Level 2: 60%+
Hints
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%
Level 1: 80%+
Hints
Select the correct option based on statements given below:
| Assertion (A): | Combustion of all organic compounds is an exothermic reaction. |
| Reason (R): | The enthalpies of all elements in their standard state are 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: Thermochemistry |
79%
Level 2: 60%+
Hints
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%
Level 3: 35%-60%
Hints
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 |
85%
Level 1: 80%+
Hints
Select the correct option based on statements below:
| Assertion (A): | Cdiamond → Cgraphite ∆H and ∆U are the same for this reaction. |
| Reason (R): | Entropy increases during the conversion of diamond to graphite. |
| 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. | Both (A) and (R) are false. |
Subtopic: Enthalpy & Internal energy |
67%
Level 2: 60%+
Hints
Select the correct option based on the statements given below:
| Statement I. | Specific heat is an intensive property. |
| Statement II. | Heat capacity is an extensive property. |
| 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: Classification of System, Extensive & Intensive Properties |
Level 3: 35%-60%
Hints
Links
Select the correct option based on statements below:
| Assertion (A): | Dissolution of sugar in water proceeds via an increase in entropy. |
| Reason (R): | Entropy decreases, when an egg is boiled hard. |
| 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. | Both (A) and (R) are false. |
Subtopic: Spontaneity & Entropy |
67%
Level 2: 60%+
Hints
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