For a given substance at a specified temperature, activity is __________ to fugacity. Directly proportional Equal Inversely proportional None of these TRUE ANSWER : ? YOUR ANSWER : ?
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work. Isentropic Isothermal Adiabatic None of these TRUE ANSWER : ? YOUR ANSWER : ?
Dry ice is Moisture free ice None of these Solid carbon dioxide Solid helium TRUE ANSWER : ? YOUR ANSWER : ?
When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is Same in both the phases Zero in both the phases More in liquid phase More in vapour phase TRUE ANSWER : ? YOUR ANSWER : ?
Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as P + F - C = 2 C = P - F + 2 P = F - C - 2 F = C - P - 2 TRUE ANSWER : ? YOUR ANSWER : ?
What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor? 2 3 1 0 TRUE ANSWER : ? YOUR ANSWER : ?
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is Equal More pronounced Less pronounced Data insufficient, can't be predicted TRUE ANSWER : ? YOUR ANSWER : ?
In the reaction, C + O₂ → CO₂ ; ΔH = - 94 kcal. What is the heat content (enthalpy)of O₂? Zero < - 94 kcal > -94 kcal -94 kcal TRUE ANSWER : ? YOUR ANSWER : ?
At the critical point of a substance The surface tension vanishes Liquid and vapour have the same density There is no distinction between liquid and vapour phases All of these TRUE ANSWER : ? YOUR ANSWER : ?
In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is More Less Same Unpredictable; depends on the particular reaction TRUE ANSWER : ? YOUR ANSWER : ?