Q. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules

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Q. With increase in the solute concentration, the specific heat of aqueous solutions

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Q. The heat capacity of a substance is

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Q. The heat of solution depends upon the

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Q. The molar composition of a gas is 10% H₂, 10% O₂, 30% CO₂ and balance H₂O. If 50% H₂O condenses, the final mole percent of H₂ in the gas on a dry basis will be

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Q. The heats of vaporisation of CS₂, C₂H₅OH & H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

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Q. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal

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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 0.74 x 10⁻⁵ m²/s.The numerical value of mass transfer co-efficient is 7.4 x 10⁻³. Its units are

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Q. If 1.5 moles of oxygen combines with aluminium to form Al₂O₃, then the weight of aluminium (atomic weight = 27 ) used in this reaction is __________ gm.

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Q. The unit of dynamic viscosity is

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Q. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is

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Q. Saturated molal absolute humidity of the vapor-gas mixture depends upon the

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Q. At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to

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Q. 'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

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Q. Boiling point of a non-homogeneous mixture of immiscible liquids is __________ that of any one of its separate components.

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Q. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.

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Q. Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

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Q. The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become 3/4 (0.75ρ)at a temperature of __________ °K

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Q. A gas occupies a volume of 283 c.c at 10°C. If it is heated to 20°C at constant pressure, the new volume of the gas will be __________ c.c.

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Q. In the reaction, represented by Na₂CO₃ + HCl → NaHO₃ + NaCl, the equivalent weight of Na₂CO₃ is

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