51. 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.
Statiometery MCQs
52. A vapor that exists above its critical temperature is termed as a __________ vapor.
Saturated
Unsaturated
Gaseous
Sub-cooled
✅ The correct answer is option C.
53. 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.
54. 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.
55. 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.
56. The heat evolved in the combustion of benzene is represented by the equation: C₆H₆ + 7.5 O₂ = 6CO₂ + 3H₂O, ΔH = 3264.6 kJ/kg. mole The heat energy change, when 39 gm of C₆H₆ is burnt in an open container, will be __________ kJ/kgmole.
816.15
1632.3
-1632.3
-2448.45
✅ The correct answer is option C.
58. Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is
1-Sep
8-Sep
1-Feb
5-Sep
✅ The correct answer is option B.
59. 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.
60. Cv for monoatomic gases is equal to(where, R = gas constant)
R
1.5 R
2R
3R
✅ The correct answer is option B.