Consider a mixture of three gases a, b and c at equilibrium. If the individual gas components have pressures equal to Pa, Pb and Pc, determine the total pressure P of the mixture of gases.
a) P = Pa + Pb + Pc
b) P = Pa x Pb x Pc /(Pa + Pb + Pc)
c) P = [(Pa x Pb) + (Pb x Pc) + (Pc x Pa)] / (Pa + Pb + Pc)
d) P = (Pa x Pb / Pc) + (Pb x Pc / Pa) + (Pc x Pa / Pb)
Q.2.
Perfect gas equation applies very closely to ________ gases.
a) low temperature, low pressure
b) high temperature, high pressure
c) high temperature, low pressure
d) low temperature, high pressure
Q.3.
Consider two sets of mixture of gases A and B having the same specific volume of the mixture and having total pressures PA and PB respectively. If TA = 3TB and molecular mass of A MA = 1/2 MB, determine the ratio of PA/PB.
a) 0.75
b) 12
c) 1.5
d) 6
Q.4.
Consider two sets of mixture of gases X and Y having the same total temperature of the mixture and having total pressures PX and PY respectively. If PX = 1.4 PY and molecular mass of A MX = 2.3 x MY, determine the ratio of Vmix_X/Vmix_Y.
a) 0.26
b) 0.52
c) 0.62
d) 0.31
Q.5.
In a gaseous mixture, the number of moles and the molecular mass (in their respective units) of each component is given as follows: nA =MA =nB =MB =nC =MC =Find the average molecular mass of the mixture.
a) 28.67
b) 29.33
c) 31.25
d) 25.47
Q.6.
What is the number of condensed species in a gaseous mixture, if there are 8 possible species which enter into a relationship and out of these, only 5 are gases?
a) 3
b) 2
c) 9
d) 6
Q.7.
Determine the stoichiometric mixture mass ratio for the complete reaction: H2 + 1/2 O2 → H2O.
a) 2:1
b) 16:1
c) 4:1
d) 8:1
Q.8.
Rocket propulsion usually operates in ___________ mixture ratio.
a) fuel rich
b) oxidizer rich
c) stoichiometric
d) any
Q.9.
The decomposition of solid propellants to reaction mixture is a(n) ______________ chemical reaction.
a) reversible
b) irreversible
c) stoichiometric
d) ideal
Q.10.
What is the energy released (or absorbed), or the enthalpy change when one mole of a chemical compound is formed from its constituent atoms or elements at one bar and isothermally at 25°C?
a) Heat of formation
b) Heat of reaction
c) Gibbs free energy
d) Latent heat of vaporization
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