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- Question
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.
- Correct Answer
- The integral heat of solution of either components can not be calculated from heat of mixing data.
- 1. Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces?
Options- A. RT
- B.
- C. (V - b)
- D. 1/RT Discuss
- 2. A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is
Options- A. 380
- B. 630
- C. 760
- D. 880 Discuss
- 3. Vapor pressure of a solution is proportional to(where, Sv and St are mole fraction of solvent and solute respectively).
Options- A. Sv
- B. 1/St
- C. St
- D. 1/Sv Discuss
- 4. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20)?
Options- A. AB3
- B. A2B3
- C. A2B
- D. AB2 Discuss
- 5. Addition of a non-volatile solute to a pure solvent
Options- A. increases its freezing point.
- B. increases its boiling point.
- C. decreases its freezing point.
- D. both (b) and (c) Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. Disappearance of snow in subzero weather exemplifies the process of
Options- A. evaporation
- B. sublimation
- C. vaporisation
- D. melting Discuss
Stoichiometry problems
Search Results
Correct Answer: RT
Correct Answer: 630
Correct Answer: Sv
Correct Answer: AB3
Correct Answer: both (b) and (c)
Correct Answer: 1 kPa = 100 bar
Correct Answer: 650
Correct Answer: increases
Correct Answer: 30 c.c acid and 30 c.c base.
Correct Answer: sublimation
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