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

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Q. Volume percent for gases is equal to the

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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

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Q. Cᵨ equals Cᵥ at

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Q. Pick out the wrong statement.

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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

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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

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Q. An oxidation process is accompanied by decrease in the

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

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

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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

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Q. N.T.P. corresponds to

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

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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

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

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

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Q. The osmotic pressure of a solution increases, if its __________ is decreased.

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Q. 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 0.74x10⁻⁵ m²/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

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Q. In osmosis through a semi-permeable membrane, diffusion of the

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Q. Heat of reaction is not influenced by

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