Stoichiometry problems
- 1. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
Options- A. kinetic energy.
- B. intermolecular forces of attraction.
- C. potential energy.
- D. total energy. Discuss
Correct Answer: kinetic energy.
- 2. Pick out the correct conversion.
Options- A. 1 BTU =453.6 calories
- B. 1 BTU = 252 calories
- C. 1 calorie = 252 BTU
- D. 1 calorie = 453.6 BTU Discuss
Correct Answer: 1 BTU = 252 calories
- 3. The osmotic pressure of a solution is directly proportional to the
Options- A. lowering of vapor pressure.
- B. molecular concentration of the solute.
- C. absolute temperature of a given concentration.
- D. all (a), (b) and (c). Discuss
Correct Answer: all (a), (b) and (c).
- 4. Two solutions A1 and A2 have pH value of 2 and 6 respectively. It implies that the solution
Options- A. A2 is more alkaline than solution A2
- B. A1 is highly acidic.
- C. A1 is very slightly acidic.
- D. both (a) &(c). Discuss
Correct Answer: both (a) &(c).
- 5. The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).
Options- A. T
- B. T
- C. T2
- D. 1/T Discuss
Correct Answer: T
- 6. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
Options- A. Use of equation of state
- B. Fugacity co-efficient
- C. Activity co-efficient
- D. None of these Discuss
Correct Answer: Activity co-efficient
- 7. Which of the following is followed by an ideal solution?
Options- A. Boyle's law
- B. Amgat's law
- C. Raoult's law
- D. Trouton's rule Discuss
Correct Answer: Raoult's law
- 8. The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg.?
Options- A. 0.2
- B. 0.1
- C. 0.4
- D. 0.6 Discuss
Correct Answer: 0.6
- 9. If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
Options- A. be reduced to l/4th.
- B. increase four times.
- C. increase two times.
- D. none of these. Discuss
Correct Answer: increase four times.
- 10. "The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes". This is the __________ law.
Options- A. Dalton's
- B. Amgat's
- C. GayLussac's
- D. Avogadro's Discuss
Correct Answer: Amgat's
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