253. Absolute zero pressure will occur
A.At sea level
B.At the centre of the earth
C.When molecular momentum of the system becomes zero
D.Under vacuum conditions

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254. No liquid can exist as liquid at
A.-273 °K
B.Vacuum
C.Zero pressure
D.Centre of earth

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255. The unit of power in S.I. units is
A.Newton
B.Pascal
C.Erg
D.Watt

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256. 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

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257. 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

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258. Specific heat of air at constant pressure is equal to
A.0.17
B.0.21
C.0.24
D.1

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259. Characteristic gas constant of a gas is equal to
A.Cp/Cv
B.Cv/Cp
C.Cp - Cv
D.Cp+ Cv

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