6921. The temperature at which the second Virial co-efficient of a real gas is zero is called the
Eutectic point
Boyle temperature
Boiling point
Critical temperature
✅ The correct answer is option A.
Chemical Engineering
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6922. Gases having same reduced temperatures and reduced pressures
Deviate from ideal gas behaviour to the same degree
Have nearly the same compressibility factor
Both A & B
Neither A nor B
✅ The correct answer is option C.
6923. Which of the following is an exothermic reaction?
Conversion of graphite to diamond
Decomposition of water
Dehydrogenation of ethane to ethylene
None of these
✅ The correct answer is option D.
6924. At room temperature, the product [H⁺] [OH⁻] in a solution is 10⁻¹⁴ moles/litre. If, [OH⁻] = 10⁻⁶ moles/litre, then the pH of the solution will be
6
8
10
12
✅ The correct answer is option B.
6925. On mixing 56 gm of CaO with 63 gm of HNO₃, the amount of Ca(NO₃)₂ formed is __________ gm.
82
164
41
8.2
✅ The correct answer is option A.
6926. In osmosis through a semi-permeable membrane, diffusion of the
Solvent is from low concentration to high concentration region
Solvent is from high concentration to low concentration region
Solute takes place
None of these
✅ The correct answer is option A.
6927. Pure oxygen is mixed with air to produce an enriched air containing 50 volume % of oxygen. The ratio of moles of air to oxygen used is
1.72
0.58
0.5
0.2
✅ The correct answer is option B.
6929. Roult’s law is obeyed by a __________ solution.
Saturated
Molar
Normal
None of these
✅ The correct answer is option D.
6930. Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?
Temperature
Nature of solute
Pressure
Nature of solvent
✅ The correct answer is option C.