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- Question
A chemical process is said to occur under unsteady state, if the
Options- A. inventory changes do not take place.
- B. ratio of streams entering/leaving are independent of time.
- C. flow rates & composition both are time dependent.
- D. none of these.
- Correct Answer
- flow rates & composition both are time dependent.
- 1. 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
- 2. 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
- 3. 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
- 4. 1 BTU/ft3 is approximately equal to __________ kcal/m3.
Options- A. 1
- B. 9
- C. 4
- D. 252 Discuss
- 5. Total energy at a point comprises of __________ energy.
Options- A. potential & kinetic
- B. pressure
- C. internal
- D. all (a), (b) & (c). Discuss
- 6. At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be
Options- A. significantly less than 4.69 atm.
- B. nearly equal to 4.69 atm.
- C. significantly more than 4.69 atm.
- D. indeterminate due to lack of data Discuss
- 7. For estimation of heat capacity of a solid compound, one can use
Options- A. Clayperon's equation
- B. Gibb's equation
- C. Kopp's rule
- D. Trouton's rule Discuss
- 8. Which of the following ratios defines the recycle ratio in a chemical process?
Options- A. Gross feed stream/recycle feed stream
- B. Recycle stream/fresh feed stream
- C. Recycle stream/gross feed stream
- D. None of these Discuss
- 9. With increase in the temperature of pure (distilled) water, its
Options- A. pOH decreases and pH increases.
- B. pOH and pH both 4ecreases.
- C. pH and pOH both increases.
- D. pH decreases and pOH increases. Discuss
- 10. Size range of the colloidals particles is
Options- A. 5 - 200 milli-microns
- B. 50 - 200 microns
- C. 500 - 1000 microns
- D. 10 - 50 Angstrom Discuss
Stoichiometry problems
Search Results
Correct Answer: changes in heat of reaction.
Correct Answer: The temperature at which a vapor is saturated is termed as the boiling point.
Correct Answer: 801.5
Correct Answer: 9
Correct Answer: all (a), (b) & (c).
Correct Answer: significantly more than 4.69 atm.
Correct Answer: Kopp's rule
Correct Answer: Recycle stream/fresh feed stream
Correct Answer: pOH and pH both 4ecreases.
Correct Answer: 5 - 200 milli-microns
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