Stoichiometry

A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. 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_________________? A. 3 kmole/hr B. 4 kmole/hrC. 5 kmole/hr D. 6 kmole/hr

The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases? A. Potential energy B. Intermolecular forcesC. Kinetic energy D. Total energy

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________________? A. 20 B. 32.2 C. 45.35D. 58.65

At a temperature of 0°K, the molecules of a gas have only _______________ energy? A. Rotational B. VibrationalC. Translational D. None of these

On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm? A. 82 B. 164 C. 41 D. 8.2

Atmospheric pressure corresponds to a hydrostatic head of_________________? A. 13.6 cms of HgB. 34 ft ofH2O C. 1 metre of H2O D. 13.6 metres of Hg

The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________? A. 2M B. M/2 C. M D. M/4

Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity? Vapour pressure of water at 20°C is 17.5 mm Hg? A. 80.38 B. 80C. 79.62 D. 78.51

Clausius Clapeyron equation applies to the _____________ process? A. Sublimation B. Melting C. VaporisationD. All A., B. & C.

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_________________? A. 0.00B. 0.18 C. 0.24 D. 1.00