- 1(current)
Q. No.Assertion(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 |
65%
From NCERT
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Consider the given two statements:
| Assertion (A): | The temperature of a gas does not change when it undergoes an adiabatic expansion. |
| Reason (R): | During an adiabatic process, the container should be a perfect conductor. |
| 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 |
64%
From NCERT
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Assertion(A): The enthalpy of formation of gaseous oxygen molecules at 298 K under a pressure of one atm is zero.
Reason(R): The entropy of the formation of gaseous oxygen molecules under the same conditions is 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 and R is false.
4. A and R both are false.
Reason(R): The entropy of the formation of gaseous oxygen molecules under the same conditions is 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 and R is false.
4. A and R both are false.
Subtopic: Thermochemistry |
52%
From NCERT
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Assertion(A): Enthalpy of graphite is lower than that of a diamond.
Reason(R): Entropy of graphite is greater than that of a diamond.
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): Entropy of graphite is greater than that of a diamond.
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 |
66%
From NCERT
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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 |
56%
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%
From NCERT
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| Statement I: | The standard enthalpy change for the formation of one mole of a compound from its elements in their most stable states (reference states) is called standard molar enthalpy of formation. |
| Statement II: | For, CaO(s)+ CO2 (g) → CaCO3(s) ; ∆fH⊝ = -178.3 kJmol-1 , the ∆rH⊝ is equal to the ∆fH⊝ . |
1. Both statements I and II are true.
2. Statement I is true; and statement II is false.
3. Both statements I and II are false.
4. Statement I is false; statement II is true.
Subtopic: Thermochemistry |
56%
From NCERT
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- 1(current)
Q. No.
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