1. The unit of temperature in S.I. units
is
(a) Centigrade
(b) Celsius
(c) Fahrenheit
(d) Kelvin
Answer : d
2. The unit of energy in S.I. units is
(a) watt (b)
joule
(c) joule/s
(d) joule/m
Answer : b
3. The unit of pressure in S.I. units is
(a) kg/cm2
(b) mm of water column
(c) pascal
(d) dynes per square cm
Answer : c
4. A closed system is one in which
(a) mass does not cross boundaries of the
system, though energy may do so
(b) mass crosses the boundary but not the
energy
(c) neither mass nor energy crosses the
boundaries of the system
(d) both energy and mass cross the boundaries of the system
Answer : a
5. Superheated vapour behaves
(a) exactly as gas (b) as steam
(c) as ordinary vapour (d) approximately as a gas
Answer : d
6. No liquid can exist as liquid at
(a) – 273 °K
(b) vacuum
(c) zero pressure (d) center of earth
Answer : c
7. Absolute zero pressure will occur
(a) at sea level
(b) at the center of the earth
(c) when molecular momentum of the system
becomes zero
(d) under vacuum conditions (e) at a
temperature of – 273 °K
Answer : c
8. The unit of power in S.I. units is
(a) newton
(b) pascal
(c) watt (e) joule.
Answer : c
9. The condition of perfect vacuum, i.e.,
absolute zero pressure can be attained at
(a) a temperature of – 273.16°C (b) a
temperature of 0°C
(c) a temperature of 273 °K (d) a negative
pressure and 0°C temperature
Answer : a
10. Intensive property of a system is one
whose value
(a) depends on the mass of the system,
like volume
(b) does not depend on the mass of the system,
like temperature, pressure, etc.
(c) is not dependent on the path followed
but on the state
(d) is dependent on the path followed and
not on the state
Answer : b
11. An open system is one in which
(a) mass does not cross boundaries of the
system, though energy may do so
(b) neither mass nor energy crosses the
boundaries of the system
(c) both energy and mass cross the
boundaries of the system
(d) mass crosses the boundary but not the
energy
(e) thermodynamic reactions do not occur.
Answer : c
12. Work done in a free expansion process
is
(a) + ve
(b) -ve
(c) zero
(d) maximum
Answer : c
13. If a gas is heated against a pressure,
keeping the volume constant, then work done will be equal to
(a) + v
(b) – ve
(c) zero
(d) pressure x volume
Answer : c
14. Which of the following quantities is
not the property of the system
(a) pressure (b)
temperature
(c) specific volume
(d) heat
Answer : d
15. Mixture of ice and water form a
(a) closed system
(b) open system
(c) isolated system (d) heterogeneous system
Answer : d
16. Which of the following is the property
of a system
(a) pressure and temperature (b) internal energy
(c) volume and
density
(d) enthalpy and entropy
(e) all of the above.
Answer : e
17. Which of the following is not the intensive
property
(a) pressure
(b) temperature
(c) density (d) heat
Answer : d
18. Extensive property of a system is one
whose value
(a) depends on the mass of the system like
volume
(b) does not depend on the mass of the
system, like temperature, pressure, etc.
(c) is not dependent on the path followed
but on the state
(d) is dependent on the path followed and
not on the state
(e) is always constant.
Answer : a
19. Which of the following items is not a
path function
(a) heat (b)
work
(c) kinetic energy
(d) VdP
(e) thermal conductivity.
Answer : e
20. Heat and work are
(a) point functions
(b) system properties
(c) path functions
(d) intensive properties
(e) extensive properties.
Answer : c
21.
Change in enthalpy of a system is the heat supplied at
(a)
constant pressure
(b) constant temperature
(c)
constant volume (d) constant
entropy
(e)
N.T.P. condition.
Answer : a
