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- Question
Pick out the wrong statement about distillation operation
Options- A. Distillation under vacuum is a substitute for steam distillation.
- B. In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation.
- C. In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with each other.
- D. Flash distillation, differential distillation & steam distillation are all continuous distillation processes.
- Correct Answer
- Flash distillation, differential distillation & steam distillation are all continuous distillation processes.
- 1. In distillation columns, the number of bubble caps per tray primarily depends upon the
Options- A. allowable liquid velocity.
- B. allowable gas velocity.
- C. allowable gas and liquid velocities.
- D. feed composition. Discuss
- 2. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is
Options- A. 0.50
- B. 0.60
- C. 2
- D. 1 Discuss
- 3. The average boiling point of aviation turbine fuel is closest to that of
Options- A. lubricating oils
- B. LPG
- C. diesel
- D. Kerosene Discuss
- 4. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
Options- A. hexamethylene diamine and the ring.
- B. hexamethylene diamine and the adipic acid.
- C. adipic acid and the ring.
- D. none of these. Discuss
- 5. Presence of non-biodegradable substances, like alkyl benzene sulphonate (ABS) from the detergents in polluted water stream causes
Options- A. fire hazards.
- B. explosion hazards.
- C. persistent foam.
- D. depletion of dissolved oxygen. Discuss
- 6. Increasing the temperature of an aqueous solution will cause decrease in its
Options- A. molality
- B. mole fraction
- C. weight percent
- D. molarity Discuss
- 7. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
Options- A. decreases
- B. increases
- C. remains same
- D. decreases linearly Discuss
- 8. The decrease in the atomic number is not observed in case of
Options- A. electron capture
- B. ?-emission
- C. ?-emission
- D. positron emission Discuss
- 9. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because
Options- A. of clotting of blood.
- B. of jamming of respiratory tract.
- C. it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.
- D. it forms CO2 by combining with oxygen present in the blood. Discuss
- 10. An ideal gas can be liquified, because
Options- A. its molecular size is very small.
- B. its critical temperature is more than 0°C.
- C. forces operative between its molecules are negligible.
- D. it gets solidified directly without becoming liquid. Discuss
More questions
Correct Answer: allowable gas and liquid velocities.
Correct Answer: 0.50
Correct Answer: Kerosene
Correct Answer: hexamethylene diamine and the adipic acid.
Correct Answer: persistent foam.
Correct Answer: molarity
Correct Answer: increases
Correct Answer: ?-emission
Correct Answer: it forms carboxyhaemoglobin by combining with haemoglobin of blood, thereby making it incapable of absorbing oxygen.
Correct Answer: forces operative between its molecules are negligible.
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