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. |
Given below are two statements:
|
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. |
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. |
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. |
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. |
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. |