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- Question
Disappearance of snow in subzero weather exemplifies the process of
Options- A. evaporation
- B. sublimation
- C. vaporisation
- D. melting
- Correct Answer
- sublimation
- 1. In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest?
Options- A. 30 c.c acid and 30 c.c base.
- B. 20 c.c acid and 25 c.c base.
- C. 15 c.c acid and 35 c.c base.
- D. 35 c.c acid and 15 c.c base. Discuss
- 2. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
Options- A. varies linearly
- B. increases
- C. decreases
- D. does not vary Discuss
- 3. 500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.
Options- A. 650
- B. 700
- C. 600
- D. 375 Discuss
- 4. Pick out the wrong unit conversion.
Options- A. 1 atm. = 760 mm Hg = 29.92 inch Hg = 14.7 psi = 1.013 bar = 1.013 kgf/cm2
- B. 1 kPa = 100 bar
- C. 1 mm Hg = 1 torr = 133.3 Pa
- D. - Discuss
- 5. Pick out the wrong statement:
Options- A. The integral heat of solution of either components can not be calculated from heat of mixing data.
- B. The average value of heat of neutralisation of dilute solutions of weak acids and bases is much less compared to that for strong acids and bases.
- C. The standard heat of solution of the hydrate of a substance is the difference between the heat of solution of the anhydrous substance and its heat of hydration.
- D. The accompanying enthalpy change, when a solute is dissolved in solvent, depends upon the nature & amount of the solute & the solvent, on the temperature & on the initial & final concentrations of the solution. Discuss
- 6. One 'Therm' is equivalent to
Options- A. 105 BTU
- B. 105 kcal
- C. 109 BTU
- D. 109 kcal Discuss
- 7. In case of a solution (not of a solid in a liquid), whose total volume is less than the sum of the volumes of its components in their pure states, solubility is
Options- A. independent of temperature.
- B. increases with rise in pressure.
- C. increased with decrease in pressure.
- D. unchanged with pressure changes. Discuss
- 8. Which of the following has the smallest least effect on the solubility of a solute into the solvent?
Options- A. Nature of the solute
- B. Nature of the solvent
- C. Temperature
- D. Pressure Discuss
- 9. For an endothermic reaction, the minimum value of energy of activation will be (where, ?H = enthalpy of the reaction)
Options- A. ? H
- B. >?H
- C. <?H
- D. 0 Discuss
- 10. 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
Stoichiometry problems
Search Results
Correct Answer: 30 c.c acid and 30 c.c base.
Correct Answer: increases
Correct Answer: 650
Correct Answer: 1 kPa = 100 bar
Correct Answer: The integral heat of solution of either components can not be calculated from heat of mixing data.
Correct Answer: 105 BTU
Correct Answer: increases with rise in pressure.
Correct Answer: Pressure
Correct Answer: >?H
Correct Answer: 1
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