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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Q. The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 x __________

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Q. The density of a liquid is 1500 kg/m³. Its value in gin/litre will be equal to

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Q. The heat of vaporisation __________ with increase in pressure.

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Q. Raoult's law is not applicable to the

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Q. A compound was found having nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is

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Q. The atomic heat capacities of all solid elements __________ with decrease in temperature.

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Q. Raoult's law states that 'the equilibrium vapor pressure that is exerted by a component in a solution is proportional to the mole fraction of that component'. This generalisation is based on the assumption that the

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