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Q. No.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%
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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%+
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Select the correct option based on statements below:
| Assertion (A): | Combustion is an exothermic process. |
| Reason (R): | Combustion is a spontaneous process. |
| 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: Thermochemistry |
57%
Level 3: 35%-60%
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%
Hints
Select the correct option based on statements below:
| Assertion (A): | ∆H is positive for endothermic reactions. |
| Reason (R): | If the total enthalpy of reactants and products are Hr & Hp respectively, then for an endothermic reaction HR < HP. |
| 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 |
81%
Level 1: 80%+
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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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
For the given reaction
, the heat of formations of are -188 kJ/mol & -286 KJ/mol respectively. The change in the enthalpy of the reaction will be:
1. – 196 kJ/mol
2. + 196 kJ/mol
3. + 948 kJ/mol
4. – 948 kJ/mol
Subtopic: Enthalpy & Internal energy |
77%
Level 2: 60%+
AIPMT - 2001
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The difference between enthalpy (∆H) and internal energy (∆E) for the given below reaction,
under constant temperature, is:
\(C_{3} H_{8} \left(\right. g \left.\right) + 5 O_{2} \left(\right. g \left.\right) \rightarrow 3 CO_{2} \left(\right. g \left.\right) + 4 H_{2} O \left(\right. l \left.\right)\)
| 1. | + RT | 2. | – 3RT |
| 3. | + 3RT | 4. | – RT |
Subtopic: Enthalpy & Internal energy |
85%
Level 1: 80%+
AIPMT - 2003
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At standard conditions, if the change in the enthalpy for the following reaction is –109 kJ mol–1
H2(g)+Br2(g)2HBr(g) and the bond energy of H2 and Br2 is 435 kJ mol–1 and 192 kJ mol–1 respectively, what is the bond energy (in kJ mol–1) of HBr?
| 1. | 368 | 2. | 736 |
| 3. | 518 | 4. | 259 |
Subtopic: Thermochemistry |
57%
Level 3: 35%-60%
NEET - 2020
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