Stoichiometry problems
- 1. Number of gm moles of solute dissolved in 1 kg of solvent is called its
Options- A. normality
- B. molarity
- C. molality
- D. formality Discuss
Correct Answer: molality
- 2. 1 ata is equivalent to
Options- A. 1 atm.
- B. 10 torr
- C. 0.98 Pascal
- D. 1 kgf/cm2 Discuss
Correct Answer: 1 kgf/cm2
- 3. The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
Options- A. basic
- B. more acidic
- C. neutral
- D. of the same acidity Discuss
Correct Answer: basic
- 4. 1 centipoise is equivalent to
Options- A. 1 gm/cm.second
- B. 1 centistoke
- C. 2.42 lb/ft.hr
- D. 2.42 lb/ft.second Discuss
Correct Answer: 2.42 lb/ft.hr
- 5. Number of gm moles of solute dissolved in one litre of a solution is called its
Options- A. equivalent weight
- B. molarity
- C. molality
- D. normality Discuss
Correct Answer: molarity
- 6. Total energy at a point comprises of __________ energy.
Options- A. potential & kinetic
- B. pressure
- C. internal
- D. all (a), (b) & (c). Discuss
Correct Answer: all (a), (b) & (c).
- 7. 1 BTU/ft3 is approximately equal to __________ kcal/m3.
Options- A. 1
- B. 9
- C. 4
- D. 252 Discuss
Correct Answer: 9
- 8. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively?
Options- A. 756.2
- B. 780.5
- C. 801.5
- D. 880.5 Discuss
Correct Answer: 801.5
- 9. Pick out the wrong statement:
Options- A. A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure.
- B. A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a 'superheated vapor'.
- C. The temperature at which a vapor is saturated is termed as the boiling point.
- D. The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its 'degree of superheat'. Discuss
Correct Answer: The temperature at which a vapor is saturated is termed as the boiling point.
- 10. Hess's law of constant heat summation is based on conservation of mass. It deals with
Options- A. equilibrium constant.
- B. reaction rate.
- C. changes in heat of reaction.
- D. none of these. Discuss
Correct Answer: changes in heat of reaction.
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