On weight basis, air contains following parts of oxygen_________________?
(A) 21
(B) 23
(C) 25
(D) 73
(D) 79
Mixture of ice and water form a________________________?
(A) closed system
(B) open system
(C) isolated system
(D) heterogeneous system
(D) thermodynamic system.
Which of the following quantities is not the property of the system__________________?
(A) pressure
(B) temperature
(C) specific volume
(D) heat
(D) density
An isolated 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
(D) thermodynamic reactions do not occur
To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is____________________?
(A) divided by its molecular weight
(B) multiplied by its molecular weight
(C) multiplied by its density
(D) multiplied by its specific weight
(D) divided by its specific weight
Work done in a free expansion process is___________________?
(A) + ve
(B) -ve
(C) zero
(D) maximum
(D) minimum
According to Avogadro’s Hypothesis ______________________?
(A) the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
(B) the sum of partial pressure of mixture of two gases is sum of the two
(C) product of the gas constant and the molecular weight of an ideal gas is constant
(D) gases have two values of specific heat
(D) all systems can be regarded as closed systems
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 ____________________?
(A) Joule’s law
(B) Boyle’s law
(C) Regnault’s law
(D) Gay-Lussac law
(D) Charles’ law
Pick up the incorrect statement?
(A) lithium bromide used in vapour absorption cycle is nonvolatile
(B) lithium bromide plant can’t operate below 0°C
(C) a separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
(D) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator
(D) weak solution in liquid heat exchanger gives up heat to the strong solution
A heat exchange process in which the product of pressure and volume remains constant is known as_______________?
(A) heat exchange process
(B) throttling process
(C) isentropic process
(D) adiabatic process
(D) hyperbolic process