6691. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
Saturated
Supersaturated
Superheated
None of these
✅ The correct answer is option C.
Chemical Engineering
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6692. A vapor that exists above its critical temperature is termed as a __________ vapor.
Saturated
Unsaturated
Gaseous
Sub-cooled
✅ The correct answer is option C.
6693. The OH⁻ concentration in a solution having pH value 3 is
10-Mar
10-Oct
10-Nov
Oct-13
✅ The correct answer is option C.
6694. Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature?
Chlorine
Nitrogen
Ethane
All of the above
✅ The correct answer is option D.
6695. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m³ . The diffusivity of aniline in air is 0.74xl0⁻⁵m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. The rate of evaporation of aniline is 2.97 x 10⁻⁴. Its units are
Mole/s
Mole/cm². s
Mole/m² . s
Kmole/m² . s
✅ The correct answer is option D.
6696. The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.
Limiting
Real
Saturated
Normal
✅ The correct answer is option C.
6697. Cv for monoatomic gases is equal to(where, R = gas constant)
R
1.5 R
2R
3R
✅ The correct answer is option B.
6698. Na₂SO₄. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is
20
32.2
45.35
58.65
✅ The correct answer is option D.
6699. A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
Saturated
Superheated
Unsaturated
Dry gaseous
✅ The correct answer is option B.
6700. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H₂ at N.T.P. on treatment with dilute H₂SO₄ will be __________ gm.
0.065
0.65
6.5
65
✅ The correct answer is option B.