X1/x2
X2/x1
1 – (x1/x2)
1/x2
✅ The correct answer is option A.
Chemical Engineering MCQs
1 kgf/cm² is not equal to
1 torr
1 bar
10000 mm wc
100 KPa = 100 000 N/m²
✅ The correct answer is option A.
Pick out the wrong unit conversion of mass transfer co-efficient.
1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar
1 kg/hr.m².atm= 0.98687 kg/hr. m .bar
1 lb/hr . ft² = 4.8823 kg/hr . m²
1 kg/hr . m² = 4.8823 lb/hr . ft²
✅ The correct answer is option D.
Refluxing of part of the distillate in a fractionating column is a ‘recycling operation’, aimed primarily at
Heat conservation
Yield enhancement
Product enrichment
None of these
✅ The correct answer is option C.
Recycling in a chemical process facilitates
Increased yield
Enrichment of product
Heat conservation
All of the above
✅ The correct answer is option D.
If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its
Bubble point
Saturation temperature
Dew point
Both B and C
✅ The correct answer is option D.
No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
Collide without loss of energy
Do work equal to loss in kinetic energy
Are above the inversion temperature
Exert no attractive force on each other
✅ The correct answer is option C.
The vapor pressure of liquids of similar chemical nature at any particular temperature __________ with increase in the molecular weight.
Increases
Decreases
Remains unchanged
Either A or B; depends on the liquid
✅ The correct answer is option B.
The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.
Increases
Decreases
Remains unchanged
Increases linearly
✅ The correct answer is option B.