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Q. No.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 |
73%
Level 2: 60%+
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Plants and living beings are examples of:
1. Isolated system
2. Adiabatic system
3. Open system
4. Closed system
Subtopic: Classification of System, Extensive & Intensive Properties |
80%
Level 1: 80%+
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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 |
73%
Level 2: 60%+
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Subtopic: Classification of System, Extensive & Intensive Properties |
83%
Level 1: 80%+
Hints
Which, among the following, is not a state function?
1. Internal energy
2. Free energy
3. Work
4. Enthalpy
Subtopic: Thermodynamics' Properties and process |
90%
Level 1: 80%+
Hints
Identify the false statement among the following.
| 1. | Temperature is a state function. |
| 2. | Work is a state function. |
| 3. | Change in the state is completely defined when the initial and final states are specified. |
| 4. | Work appears at the boundary of the system. |
Subtopic: Thermodynamics' Properties and process |
89%
Level 1: 80%+
Hints
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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When 1 g H2 gas at S.T.P is expanded to twice its initial volume, then the work done is:
1. 22.4 L atm
2. 5.6 L atm
3. 11.2 L atm
4. 44.8 L atm
Subtopic: First Law of Thermodynamics |
56%
Level 3: 35%-60%
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What is the amount of work done by an ideal gas, if the gas expands isothermally from \(10^{-3}~m^3\) to \(10^{-2}~m^3\) at \(300~K\)against a constant pressure of \(10^{5}~Nm^{-2}\)?
| 1. | \(+270 ~kJ\) | 2. | \(–900 ~J\) |
| 3. | \(+900 ~kJ\) | 4. | \(–900~ kJ\) |
Subtopic: First Law of Thermodynamics |
72%
Level 2: 60%+
NEET - 2019
Hints
Select the correct option based on statements below:
| Assertion (A): | Work done in an irreversible isothermal process at constant volume is zero. |
| Reason (R): | Work is assigned a negative sign during expansion and is assigned a positive sign during compression. |
| 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: First Law of Thermodynamics |
79%
Level 2: 60%+
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