Online Test - Thermodynamics Sample Model Paper

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1.Which of the following variables controls the physical properties of a perfect gas ____.
pressure	temperature
volume	all of the above

2.Which of the following laws is applicable for the behaviour of a perfect gas
Boyle's law	Charles'law
Gay-Lussac law	all of the above

3.The unit of temperature in S.I. units is _____.
Centigrade	Celsius
Fahrenheit	Kelvin

4.The unit of mass in S.I. units is ______.
kilogram	gram
tonne	quintal

5.The unit of time in S.I. units is _____.
second	minute
hour	day

6.The unit of length in S.I. units is _____.
metre	centimetre
kilometre	millimetre

7.The unit of energy in S.I. units is _____.
watt	joule
joule/s	joule/m

8.According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as
temperature	absolute
absolute temperature, if volume is kept constant	volume, if temperature is kept constant

9.An ideal gas as compared to a real gas at very high pressure occupies
more volume	less volume
same volume	unpredictable behaviour

10.General gas equation is _____.
PV=nRT	PV=mRT
PV = C	PV=KiRT

11.According to Dalton's law, the total pres sure of the mixture of gases is equal to _____.
greater of the partial pressures of all	average of the partial pressures of all
sum of the partial pressures of all	atmospheric pressure

12.Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits.
02, N2, steam, C02	Oz, N2, water vapour
S02, NH3, C02, moisture	02, N2, H2, air

13.The unit of pressure in S.I. units is ______.
kg/cm2	mm of water column
pascal	dynes per square cm

14.A closed system is one in which _____.
mass does not cross boundaries of the system, though energy may do so	mass crosses the boundary but not the energy
neither mass nor energy crosses the boundaries of the system	both energy and mass cross the boun-daries of the system

15.Temperature of a gas is produced due to ______.
its heating value	kinetic energy of molecules
repulsion of molecules	attraction of molecules

16.According to kinetic theory of gases, the absolute zero temperature is attained when
volume of the gas is zero	pressure of the gas is zero
kinetic energy of the molecules is zero	specific heat of gas is zero

17.Kinetic theory of gases assumes that the collisions between the molecules are ______.
perfectly elastic	perfectly inelastic
partly inelastic	partly elastic and partly inelastic

18.The pressure'of a gas in terms of its mean kinetic energy per unit volume E is equal to _____.
E/3	E/2
3E/4	2E/3

19.Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to _____.
T	j
J2	Vr

20.Superheated vapour behaves _____.
exactly as gas	as steam
as ordinary vapour	as average of gas and vapour