41. Assuming that CO₂ obeys perfect gas law, calculate the density of CO₂ (in kg/m³) at 263°C and 2 atm.
1
2
3
4
✅ The correct answer is option B.
Statiometery MCQs
42. With increase in temperature, the surface tension of water
Increases
Decreases
Remains constant
Increases linearly
✅ The correct answer is option B.
43. 40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
1-Feb
1-Mar
1-Apr
2-Mar
✅ The correct answer is option B.
44. The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. If, at a total pressure of one standard atm. exerted by the vapours of water and toluene, the mole fraction of water Xw in the vapour phase satisfies
0 < Xw < 0.5
Xw = 0.5
0.5 < Xw < 1.0
Xw = 1.0
✅ The correct answer is option C.
45. Ideal solution is formed, when its components have zero
Heat of mixing
Volume change
Both A & B
Neither A nor B
✅ The correct answer is option C.
46. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
Trouton’s rule
Kopp’s rule
Antonie equation
Kistyakowsky equation
✅ The correct answer is option B.
48. Atomic __________ of an element is a whole number.
Weight
Number
Volume
Radius
✅ The correct answer is option B.
49. Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules
Do not lose energy on collision
Are above the inversion temperature
Do not exert attractive force on each other
Do work equal to loss in kinetic energy
✅ The correct answer is option C.
50. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
Kinetic energy
Intermolecular forces of attraction
Potential energy
Total energy
✅ The correct answer is option A.