274. Mixture of ice and water form a
A.Closed system
B.Open system
C.Isolated system
D.Heterogeneous system
275. Which of the following is the property of a system
A.Pressure and temperature
B.Volume and density
C.Enthalpy and entropy
D.All of the above
276. On weight basis, air contains following parts of oxygen
A.21
B.23
C.25
D.73
277. Which of the following is not the intensive property
A.Pressure
B.Temperature
C.Density
D.Heat
278. Which of the following items is not a path function
A.Heat
B.Thermal conductivity
C.Kinetic energy
D.∫vdp
279. Work done in an adiabatic process between a given pair of end states depends on
A.The end states only
B.Particular adiabatic process
C.The value of index 'n'
D.The value of heat-transferred
280. Heat and work are
A.Point functions
B.Path functions
C.Intensive properties
D.Extensive properties.
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