Stoichiometry problems
- 1. A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2 ; then the partial pressure of N2 in the mixture will be __________ kgf/cm2 .
Options- A. 1
- B. 2
- C. 4
- D. 8 Discuss
Correct Answer: 1
- 2. A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is
Options- A. 0.16
- B. 0.33
- C. 0.66
- D. 0.47 Discuss
Correct Answer: 0.33
- 3. According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to
Options- A. T
- B. T0.5
- C. T1.5
- D. T2 Discuss
Correct Answer: T0.5
- 4. Sodium __________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature.
Options- A. carbonate (monohydrate)
- B. chloride
- C. thiosulphate
- D. bisulphite Discuss
Correct Answer: carbonate (monohydrate)
- 5. The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
Options- A. 6680
- B. 13360
- C. 2481
- D. 97302 Discuss
Correct Answer: 13360
- 6. Pick out the wrong unit conversion.
Options- A. 1 Joule = 4.186 calorie.
- B. 1 kcal = 3.968 BTU = 0.00116 kWh = 0.00156 hp.
- C. 1 ton of TNT (tri-nitro-toluene) = 4.2 GJ (1G = 109).
- D. 1 ft.lbf= 0.3238 calorie = 0.1383 kg.m = 1.356 J = 1.356 N.m. Discuss
Correct Answer: 1 Joule = 4.186 calorie.
- 7. In a neutral solution
Options- A. H+ ions are absent.
- B. OH- ions are absent.
- C. both H+ and OH- ions are present in very small but equal concentration.
- D. none of these. Discuss
Correct Answer: both H+ and OH- ions are present in very small but equal concentration.
- 8. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
Options- A. saturated
- B. superheated
- C. unsaturated
- D. dry gaseous Discuss
Correct Answer: superheated
- 9. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
Options- A. Temperature
- B. Nature of solute
- C. Pressure
- D. Nature of solvent Discuss
Correct Answer: Pressure
- 10. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is
Options- A. less than 100°C
- B. 100°C
- C. between 100 and 110°C
- D. 110.6°C Discuss
Correct Answer: between 100 and 110°C
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