Q. The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately

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

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Q. The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.

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Q. In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is

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Q. For an ideal gas, the compressibility factor

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Q. One 'Therm' is equivalent to

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Q. A gas at 0°C was subjected to constant pressure cooling until its volume became half the original volume. The temperature of the gas at this stage will be

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Q. A car tyre of volume 0.057 m³ is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cᵥ for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is

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Q. According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to

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Q. Volume occupied by one gm mole of a gas at S.T.P. is

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Q. 80 kg of Na₂SO₄ (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na₂SO₄ .10H₂O crystals separate out. The weight fraction of Na₂SO₄ in the remaining solution is

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Q. Atmospheric pressure corresponds to a hydrostatic head of

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Q. At a temperature of 0°K, the molecules of a gas have only __________ energy.

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Q. A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be

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Q. "The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface". This statement pertaining to the solubility of gases in liquid is the __________ law.

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Q. Na₂SO₄. 10H₂O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na₂SO₄. The final concentration of the solute in the solution is 10%. The weight of crystals is

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Q. Which of the following gases will have the- highest kinetic energy per mole at the same pressure & temperature ?

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Q. What fraction of the total pressure is exerted by oxygen, if equal weights of oxygen and methane are mixed in an empty vessel at 25°C ?

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Q. On mixing 56 gm of CaO with 63 gm of HNO₃, the amount of Ca(NO₃)₂ formed is __________ gm.

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Q. The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.

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