Stoichiometry problems
- 1. Enthalpy of a vapor gas mixture may be increased by increasing the
Options- A. temperature at constant humidity.
- B. humidity at constant temperature.
- C. temperature and the humidity.
- D. all (a), (b) & (c). Discuss
Correct Answer: all (a), (b) & (c).
- 2. Cv for monoatomic gases is equal to(where, R = gas constant)
Options- A. R
- B. 1.5 R
- C. 2R
- D. 3R Discuss
Correct Answer: 1.5 R
- 3. Which of the following gases is the most soluble in water?
Options- A. NH3
- B. CO2
- C. H2S
- D. CH4 Discuss
Correct Answer: NH3
- 4. The temperature at which a real gas obeys Boyle's law is termed as the
Options- A. triple point
- B. Boyle's temperature
- C. eutectic point
- D. inversion temperature Discuss
Correct Answer: Boyle's temperature
- 5. Kopp's rule is useful for the determination of
Options- A. molal heat capacities of gases.
- B. heat capacities of solids.
- C. activation energy.
- D. heat capacities of gases. Discuss
Correct Answer: heat capacities of solids.
- 6. Heat of neutralisation of HCl and NaOH is - 57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.
Options- A. 57.46
- B. -57.46
- C. 114.92
- D. -28.73 Discuss
Correct Answer: 57.46
- 7. Pick out the wrong statement:
Options- A. Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve.
- B. At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite.
- C. Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture.
- D. Clapeyron equation is given by,
; where, P = vapor pressure, T = absolute temperature, ? = latent heat of vaporisation, VG and VL = volumes of gas and liquid respectively.
Discuss
Correct Answer: Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture.
- 8. __________ fuels require the maximum percentage of 'excess air' for complete combustion.
Options- A. Solid
- B. Liquid
- C. Gaseous
- D. Nuclear Discuss
Correct Answer: Solid
- 9. A 'limiting reactant' is the one, which decides the __________ in the chemical reacation.
Options- A. equilibrium constant
- B. conversion
- C. rate constant
- D. none of these Discuss
Correct Answer: conversion
- 10. For an ideal gas, the compressibility factor
Options- A. decreases with pressure rise.
- B. is unity at all temperature.
- C. is unity at Boyle's temperature.
- D. zero. Discuss
Correct Answer: is unity at all temperature.
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