Given below are two statements:
Assertion (A): | Three states of matter are the result of a balance between intermolecular forces and the thermal energy of the molecules. |
Reason (R): | Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart. |
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. |
The correct statements among the following regarding gaseous state is -
(a) | Complete order of molecules |
(b) | Complete disorder of molecules |
(c) | Random motion of molecules |
(d) | Fixed position of molecules |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Assertion (A): | Moist air is heavier than dry air. |
Reason (R): | The molecular mass of H2O is more than that of the air. |
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. |