Q.1
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
0 h : 0 m : 1 s