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- Question
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?
Options- A. Sensible heat changes for vapour & liquid are negligibly small.
- B. Reflux is not a saturated liquid.
- C. Molar latent heat of the two components are equal.
- D. Heat of mixing of normal liquid is assumed to be zero.
- Correct Answer
- Reflux is not a saturated liquid.
- 1. Atmospheric pressure corresponds to a hydrostatic head of
Options- A. 13.6 cms of Hg
- B. 34 ft ofH2O
- C. 1 metre of H2O
- D. 13.6 metres of Hg Discuss
- 2. Addition of a non-volatile solute to a solvent produces a __________ in its solvent.
Options- A. freezing point elevation
- B. boiling point depression
- C. vapor pressure lowering
- D. all (a), (b) & (c) Discuss
- 3. Fireclay bricks are not used in the
Options- A. blast furnace
- B. hot blast stove
- C. cupola
- D. wall of coke oven Discuss
- 4. The widest explosive limit is of __________ , thereby making it the most explosive gas.
Options- A. acetylene
- B. petrol vapor
- C. hydrogen
- D. carbon monoxide Discuss
- 5. An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is
Options- A. 0.2500
- B. 0.2528
- C. 0.5000
- D. 0.5055 Discuss
- 6. Presence of bacteria in potable (drinking) water causes
Options- A. turbidity
- B. disease
- C. bad odour
- D. bad taste & colour Discuss
- 7. The opening of a 200 mesh screen (Taylor series) is
Options- A. 0.0074 cm
- B. 0.0074 mm
- C. 0.0047 cm
- D. 74 mili-microns Discuss
- 8. Carbon bricks are not used in the lining of the
Options- A. combustion chamber of blast furnace stoves.
- B. electric furnaces.
- C. highly chemical resistant equipments.
- D. blast furnace hearth. Discuss
- 9. Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
Options- A. less than
- B. more than
- C. same as
- D. either more or less (depending upon relative volatility) Discuss
- 10. In batch distillation with constant reflux, overhead product composition __________ with time.
Options- A. increases
- B. decreases
- C. does not vary
- D. may increase on decrease, depends on the system. Discuss
More questions
Correct Answer: 34 ft ofH2O
Correct Answer: vapor pressure lowering
Correct Answer: wall of coke oven
Correct Answer: acetylene
Correct Answer: 0.5055
Correct Answer: disease
Correct Answer: 0.0074 cm
Correct Answer: combustion chamber of blast furnace stoves.
Correct Answer: more than
Correct Answer: decreases
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