Assertion (A): | The root mean square velocity of molecules of gas having a Maxwellian distribution of velocities is higher than their most probable velocity at any temperature. |
Reason (R): | A very small number of molecules of a gas which possess very large velocities increase root mean square velocity, without affecting the most probable velocity. |
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 root mean square and most probable speeds of the molecules in a gas are the same. |
Reason (R): | The Maxwell distribution for the speed of molecules in a gas is symmetrical. |
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): | Molecules of air in a room do not all fall and settle on the ground due to gravity. |
Reason (R): | Air molecules have very high speeds and undergo incessant collisions. |
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): | Evaporation of water which makes "Rains" a possibility to occur at the surface of water |
Reason (R): | The molecules which are very fast i.e., having speed several times the average speed can escape from water surface. |
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. |