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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Q. °API gravity of water at N.T.P. is about

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Q. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?

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Q. If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will

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Q. The OH⁻ concentration in a solution having pH value 3 is

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Q. A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of

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Q. The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg. ?

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

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Q. 2 litres of nitrogen at N.T.P. weighs __________ gms.

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Q. Which of the following is followed by an ideal solution ?

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