Stoichiometry problems
- 1. A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be
Options- A. 0°C
- B. 0°K
- C. -136.5°C
- D. -136.5°K Discuss
Correct Answer: -136.5°C
- 2. In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.
Options- A. kg of solute/kg of solvent
- B. kg-mole of solute/kg-mole of solvent
- C. kg-mole of solute/1000 kg of solvent
- D. all (a), (b) & (c) Discuss
Correct Answer: all (a), (b) & (c)
- 3. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
Options- A. bubble point.
- B. saturation temperature.
- C. dew point.
- D. both (b) and (c). Discuss
Correct Answer: both (b) and (c).
- 4. Pick out the correct statement.
Options- A. A substance existing above its critical temperature is called a saturated vapor.
- B. A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is more than the partial pressure of the vapor at the same temperature.
- C. Heat added to or given up by a substance at constant temperature is called the sensible heat.
- D. The end points of a vapor-pressure vs. temperature curve are critical and triple points. Discuss
Correct Answer: The end points of a vapor-pressure vs. temperature curve are critical and triple points.
- 5. Isotopes are atoms having the same
Options- A. mass number
- B. number of neutrons
- C. atomic mass
- D. none of these Discuss
Correct Answer: none of these
- 6. __________ equation gives the effect of temperature on heat of reaction.
Options- A. Kirchoffs
- B. Maxwell's
- C. Antonie
- D. Kistyakowsky Discuss
Correct Answer: Kirchoffs
- 7. The value of (Cp - Cv)for a real gas obeying Vander Wall's equation is
Options- A. R
- B. > R
- C. < R
- D. 0.5 R Discuss
Correct Answer: > R
- 8. In __________ process, ions of salts react with water to produce acidity or alkalinity.
Options- A. hydration
- B. hydrolysis
- C. electrolysis
- D. dialysis Discuss
Correct Answer: hydrolysis
- 9. 1 Kcal/kg. °C is equivalent to __________ BTU/lb. °F.
Options- A. 1
- B. 2.42
- C. 4.97
- D. none of these Discuss
Correct Answer: 1
- 10. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is
Options- A. 1.72
- B. 0.58
- C. 0.5
- D. 0.2 Discuss
Correct Answer: 0.58
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