Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at Heat conservation Yield enhancement None of these Product enrichment TRUE ANSWER : ? YOUR ANSWER : ?
The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation Decreases with increasing pressure Increases with pressure rise Both B & C Becomes zero at the critical point TRUE ANSWER : ? YOUR ANSWER : ?
The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of Difference of A and B Normal condensation Sum of A and B Wetting TRUE ANSWER : ? YOUR ANSWER : ?
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be -136.5°C -273°C 0°K - 136.5°K TRUE ANSWER : ? YOUR ANSWER : ?
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. 27 54 5.4 2.7 TRUE ANSWER : ? YOUR ANSWER : ?
For any system, the __________ heat of solution is dependent on the temperature and the adsorbate concentration. Differential Neither A nor B Both A & B Integral TRUE ANSWER : ? YOUR ANSWER : ?
The boiling points for pure water and pure toluene are 100°C and 110.6°C respectively. Toluene and water are completely immiscible in each other. A well agitated equimolar mixture of toluene and water are prepared. The temperature at which the above mixture will exert a pressure of one standard atm. is 100°C Between 100 and 110°C Less than 100°C 110.6°C TRUE ANSWER : ? YOUR ANSWER : ?
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the Kopp's rule Kistyakowsky equation Antonie equation Trouton's rule TRUE ANSWER : ? YOUR ANSWER : ?
One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The latent heat of condensation (kJ/kg⁻¹ ) under these conditions is 2263 540 2676 40732 TRUE ANSWER : ? YOUR ANSWER : ?