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Q. No.Match the following:
| List I | List II | ||
| 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 |
84%
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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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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 |
77%
From NCERT
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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 |
80%
From NCERT
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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 |
78%
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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 |
57%
From NCERT
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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 |
83%
From NCERT
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Thermodynamics is not concerned about:
| 1. | Energy changes involved in a chemical reaction. |
| 2. | The extent to which a chemical reaction proceeds. |
| 3. | The rate at which a reaction proceeds. |
| 4. | The feasibility of a chemical reaction. |
Subtopic: Thermodynamics' Properties and process |
72%
From NCERT
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The correct statement among the following is:
| 1. | The presence of reacting species in a covered beaker is an example of an open system. |
| 2. | There is an exchange of energy as well as matter between the system and the surroundings in a closed system. |
| 3. | The presence of reactants in a closed vessel made up of copper is an example of a closed system. |
| 4. | The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system. |
Subtopic: Thermodynamics' Properties and process |
71%
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If the volume of a gas is reduced to half from its original volume, then the specific heat will:
| 1. | Reduce to half | 2. | Be Doubled |
| 3. | Remain constant | 4. | Increase four times |
Subtopic: Classification of System, Extensive & Intensive Properties |
81%
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