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MCQs 1: The unit of energy in S.I. units is________________?

watt joule joule/s joule/m joule m.
Answer Explanation

MCQs 2: An ideal gas as compared to a real gas at very high pressure occupies_________________?

more volume less volume same volume unpredictable behaviour no such correlation
Answer Explanation

MCQs 3: 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 sum of the partial pressures of all divided by average molecular weight atmospheric pressure
Answer Explanation

MCQs 4: The unit of pressure in S.I. units is____________________?

kg/cm2 mm of water column pascal dynes per square cm bars
Answer Explanation

MCQs 5: Temperature of a gas is produced due to________________?

its heating value kinetic energy of molecules repulsion of molecules attraction of molecules surface tension of molecules
Answer Explanation

MCQs 6: Kinetic theory of gases assumes that the collisions between the molecules are________________?

perfectly elastic perfectly inelastic partly elastic partly inelastic partly elastic and partly inelastic
Answer Explanation

MCQs 7: Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to________________?

T j J2 Vr 1/Vr
Answer Explanation

MCQs 8: Absolute zero pressure will occur _____________________?

at sea level at the center of the earth when molecular momentum of the system becomes zero under vacuum conditions at a temperature of – 273 °K
Answer Explanation

MCQs 9: The condition of perfect vacuum, i.e., absolute zero pressure can be attained at ____________________?

a temperature of – 273.16°C a temperature of 0°C a temperature of 273 °K a negative pressure and 0°C temperature can’t be attained
Answer Explanation

MCQs 10: Specific heat of air at constant pressure is equal to___________________?

0.17 0.21 0.24 1.0 1.41
Answer Explanation

MCQs 11: The behaviour of gases can be fully determined by___________________?

1 law 2 laws 3 laws 4 laws
Answer Explanation

MCQs 12: Boyle’s law i.e. pV = constant is applicable to gases under ___________________?

all ranges of pressures only small range of pressures high range of pressures steady change of pressures atmospheric conditions
Answer Explanation

MCQs 13: The same volume of all gases would represent their____________________?

densities specific weights molecular weights gas characteristic constants specific gravities
Answer Explanation

MCQs 14: According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?

Joule’s law Boyle’s law Regnault’s law Gay-Lussac law Charles’ law
Answer Explanation

MCQs 15: According to Avogadro’s Hypothesis ______________________?

the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature the sum of partial pressure of mixture of two gases is sum of the two product of the gas constant and the molecular weight of an ideal gas is constant gases have two values of specific heat all systems can be regarded as closed systems
Answer Explanation

MCQs 16: Work done in a free expansion process is___________________?

+ ve -ve zero maximum minimum
Answer Explanation

MCQs 17: To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is____________________?

divided by its molecular weight multiplied by its molecular weight multiplied by its density multiplied by its specific weight divided by its specific weight
Answer Explanation

MCQs 18: An isolated system is one in which_____________________?

mass does not cross boundaries of the system, though energy may do so neither mass nor energy crosses the boundaries of the system both energy and mass cross the boundaries of the system mass crosses the boundary but not the energy thermodynamic reactions do not occur
Answer Explanation

MCQs 19: Which of the following quantities is not the property of the system__________________?

pressure temperature specific volume heat density
Answer Explanation

MCQs 20: Mixture of ice and water form a________________________?

closed system open system isolated system heterogeneous system thermodynamic system
Answer Explanation

MCQs 21: On weight basis, air contains following parts of oxygen_________________?

21 23 25 73 79
Answer Explanation

MCQs 22: Which of the following items is not a path function ____________________?

heat work kinetic energy vdp thermal conductivity
Answer Explanation

MCQs 23: Heat and work are ____________________?

point functions system properties path functions intensive properties extensive properties
Answer Explanation

MCQs 24: The value of n = 1 in the poly tropic process indicates it to be __________________?

reversible process isothermal process adiabatic process irreversible process free expansion process
Answer Explanation

MCQs 25: A perfect gas at 27°C is heated at constant pressure till its volume is double. The final temperature is________________?

54°C 327°C 108°C 654°C 600°C
Answer Explanation

MCQs 26: If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?

volume pressure temperature enthalpy entropy
Answer Explanation

MCQs 27: Change in enthalpy of a system is the heat supplied at___________________?

constant pressure constant temperature constant volume constant entropy N.T.P. condition
Answer Explanation

MCQs 28: A heat exchange process in which the product of pressure and volume remains constant is known as_______________?

heat exchange process throttling process isentropic process adiabatic process hyperbolic process
Answer Explanation

MCQs 29: Zeroth law of thermodynamics________________?

deals with conversion of mass and energy deals with reversibility and irreversibility of process states that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other deals with heat engines does not exist
Answer Explanation

MCQs 30: The basis for measuring thermodynamic property of temperature is given by___________________?

zeroth law of thermodynamics first law of thermodynamics second law of thermodynamics third law of thermodynamics Avogadro’s hypothesis
Answer Explanation

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