7351. Raoult’s law is applicable to the
Ideal solutions
Real solutions
Mixture of water and alcohol
Non-ideal gases
✅ The correct answer is option A.
Chemical Engineering
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7352. At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?
0
1
∞
< 1
✅ The correct answer is option C.
7353. Which of the following solutions will follow Raoult’s law most closely?
A solution of benzene, toluene and oxylene
35% solution of camphor in water
35% solution of NH₃ in water
A solution of polar organic compounds (not of homologs of a series)
✅ The correct answer is option A.
7354. Swenson-Walker crystalliser is a __________ unit
Continuous
Batch
Semi-batch
Cooling (adiabatic)-cum-evaporation
✅ The correct answer is option A.
7355. Pick out the wrong statement pertaining to the cooling towers.
In case of induced draft cooling tower, the fan is placed at the top of the tower
Effectiveness of forced draft cooling tower is reduced by the recirculation of the humid and hot discharged air
A natural draft cooling tower is recommended to be used, when the air humidity is low and air temperature is also low
Effectiveness of a mechanical draft cooling tower is reduced with increase in air wet-bulb temperature
✅ The correct answer is option D.
7356. Solvent used in extractive distillation
Is of low volatility
Forms a low boiling azeotrope
Forms a high boiling azeotrope
Does not alter the relative volatility of the original components
✅ The correct answer is option B.
7357. When the feed to a distillation column is a saturated liquid, slope of the feed line is
Zero
Unity
Infinity
None of these
✅ The correct answer is option C.
7358. If the amount of the steam used in steam distillation is increased, the temperature of distillation
Increases
Decreases
Remains unchanged
Depends on relative volatility
✅ The correct answer is option B.
7359. With decrease in the throughput (compared with the design capacity) for a bubble cap distillation column, its efficiency
Increases
Decreases
Remains same
May increase or decrease ; depends on individual design
✅ The correct answer is option A.
7360. Sticky material can be dried in a __________ dryer.
Tray
Rotary
Fluidised bed
None of these
✅ The correct answer is option A.