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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 |
83%
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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.
| \(\Delta\) (Parameters) \(\Delta r\ H^⊝\) \(\Delta r\ S^⊝\)\(\Delta r\ G^⊝\) | 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 |
75%
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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 |
79%
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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 |
77%
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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 |
56%
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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 |
81%
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 |
70%
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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 |
69%
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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 |
79%
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