Q. Solutions which distil without change in composition are called

View solution

Q. Gases having same reduced temperatures and reduced pressures

View solution

Q. Which of the following is not a unit of pressure ?

View solution

Q. The evaporation of aqueous solution of sugar causes its molarity to

View solution

Q. One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH₄ + 2O₂ → CO₂ + 2H₂O. Both the reactants and products are in gas phase. ΔH°₂₉₈ = - 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about

View solution

Q. Volume percent for gases is equal to the

View solution

Q. Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches

View solution

Q. Cᵨ equals Cᵥ at

View solution

Q. Pick out the wrong statement.

View solution

Q. 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

View solution

Q. A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cᵨ = 29.1 J/mole.°C and, Cᵥ = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is

View solution

Q. An oxidation process is accompanied by decrease in the

View solution

Q. Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at

View solution

Q. Which of the following expressions defines the Baume gravity scale for liquids heavier than water ?

View solution

Q. The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the

View solution

Q. N.T.P. corresponds to

View solution

Q. During a phase change process like sublimation, vaporisation, melting etc., the specific __________ does not change.

View solution

Q. 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

View solution

Q. Colligative properties of a dilute solution are those, which depend entirely upon the

View solution

Q. Viscosity of atmospheric air may be about __________ centipoise.

View solution