Q. Heat capacity of air can be approximately expressed as, Cp = 26.693 + 7.365 x10⁻³ T, where, Cp is in J/mole.K and T is in K. The heat given off by 1 mole of air when cooled at atmospheric pressure from 500°C to - 100°C is

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Q. Gases diffuse faster compared to liquids because of the reason that the liquid molecules

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Q. Equal masses of CH₄ and H₂ are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is

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Q. CaCO₃ contains __________ percent of Ca by weight.

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Q. Solutions which distil without change in composition are called

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Q. Gases having same reduced temperatures and reduced pressures

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

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

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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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