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Q. No.| Assertion (A): | For an isothermal physical process, the change in internal energy is equal to zero. |
| Reason (R): | The internal energy is directly proportional to temperature for physical processes. |
| 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
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Subtopic: Thermodynamics' Properties and process | First Law of Thermodynamics |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Decrease in free energy causes a spontaneous reaction. |
| Reason (R): | Spontaneous reactions are invariably exothermic reactions. |
| 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. |
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Subtopic: Spontaneity & Entropy |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion(A): Molar entropy of vaporization of water is different from ethanol.
Reason(R): Water is more polar than ethanol.
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 and R is false.
4. A and R both are false.
Reason(R): Water is more polar than ethanol.
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 and R is false.
4. A and R both are false.
Subtopic: Thermochemistry |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion(A): \(\Delta H\) and \(\Delta E\) are almost the same for the reaction, \(N_{2(g)} + O_{2(g)} \rightleftharpoons 2NO_(g)\)
Reason(R): All reactants and products are gases.
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 and R is false.
4. A and R both are false.
Reason(R): All reactants and products are gases.
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 and R is false.
4. A and R both are false.
Subtopic: Enthalpy & Internal energy |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | The increase in internal energy \((\Delta E ) \) for the vapourisation of one mole of water at 1 atm and 373 K is zero. |
| Reason (R): | For all isothermal processes, \(\Delta E = 0 \). |
| 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 and (R) is False. |
| 4. | (A) and (R) both are False. |
Subtopic: Enthalpy & Internal energy |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Absolute values of the internal energy of substances cannot be determined. |
| Reason (R): | It is impossible to determine the exact values of constituent energies of the substances. |
| 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | Mass and volume are extensive properties. |
| Reason (R): | Mass/volume is also an extensive parameter. |
| 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: Thermodynamics' Properties and process |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| Assertion (A): | During an adiabatic process, heat energy is not exchanged between the system and its surroundings. |
| Reason (R): | The temperature of a gas increases when it undergoes an adiabatic expansion. |
| 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: Thermodynamics' Properties and process |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssertion(A): Heat energy is completely transformed into work during the isothermal expansion of a gas.
Reason(R): During an isothermal process, the changes in the internal energy of a gas due to a decrease in pressure are nullified by the changes due to an increase in volume.
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 and R is false.
4. A and R both are false.
Reason(R): During an isothermal process, the changes in the internal energy of a gas due to a decrease in pressure are nullified by the changes due to an increase in volume.
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 and R is false.
4. A and R both are false.
Subtopic: First Law of Thermodynamics | Enthalpy & Internal energy |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect Chapter Topics:
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