Stoichiometry MCQ Questions & Answers | Chemical Engineering

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 × 10^-5 m²/s.The numerical value of mass transfer co-efficient is 7.4 × 10^-3. The rate of evaporation of aniline is 2.97 × 10^-4. Its units are

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

One Newton is equal to __________ dynes.

Pick out the wrong statement.

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.?

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

The heat change for the reaction, C(s) + 2S(s) → CS₂($$l$$), is 104.2 kJ. It represents the heat of

Which of the following is not used for computing latent heat of vaporisation?

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.

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