2. In an isothermal expansion of a gas
(a) a pressure remains constant
(b) temperature remains constant
(c) density remains constant
(d) none of these
3. If an ideal gas is isothermally expanded, its internal energy will
(a) increase
(b) decrease
(c) remain the same
(d) none of these
4. A gas is a metallic cylinder is suddenly compressed by a piston which is maintained at the same position with the passage of time the pressure of air
(a) increases
(b) decreases
(c) remains the same
(d) none of these
5. The specific heat of a gas at constant pressure is greater than the specific heat at constant volume because
(a) word is done is the expansion of the gas at constant pressure
(b) work is done in the expansion of the gas at constant volume
(c) the attraction between the molecules increases at constant pressure
(d) the molecular collision increases at constant pressure
6 A gas has
(a) one specific heat
(b) two specific heat
(c) three specific heat
(d) infinite specific heat
7. The heat transferred by the radiator of a refrigerator is
(a) more than that at the freezer
(b) less than that at the freezer
(c) the same as that at the freezer
(d) none of these
8. Melting point of ice
(a) increase with increase of pressure
(b) decreases with increase of pressure
(c) is independent of pressure
(d) none of these
9. Two blocks of ice when pressed together joint to form one block because
(a) of heat produced during pressing
(b) of cold produced during pressing
(c) melting point of ice increases with increase of pressure
(d) melting point of ice decreases with increased of pressure
10. In a pressure cooker the cooking is fast because
(a) the boiling point of water is raised by the increased pressure inside the cooker
(b) the boiling point of water is lowered by the increased pressure
(c) more steam is available to cook the food at 1000 ° C
(d) none of these
Solutions
1.C
2.B
3.C
4.B
5.A
6.D
7.A
8.B
9.D
10.A
