281. pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be
0
10
7
14
✅ The correct answer is option C.
Statiometery MCQs
282. 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.
283. 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.
284. Enthalpy of formation of NH₃ is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH₃ → N₂ + 3H₂, is equal to __________ kJ/kg. mole.
46
92
-23
-92
✅ The correct answer is option B.
286. 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.
287. 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.
289. Roult’s law is obeyed by a __________ solution.
Saturated
Molar
Normal
None of these
✅ The correct answer is option D.
290. 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.