If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst None of these Porosity is very important Internal surface area is utilised efficiently Porosity is of less importance TRUE ANSWER : ? YOUR ANSWER : ?
The conversion of a reactant, undergoing a first order reaction, at a time equal to three times the half life of the reaction is 0.875 0.5 Data insufficient to calculate 0.425 TRUE ANSWER : ? YOUR ANSWER : ?
What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on? Litre/second Litre/mole Litre/mole.second Moles/litre.second TRUE ANSWER : ? YOUR ANSWER : ?
The energy balance equation over a tubular reactor under transient conditions is An ordinary non-linear differential equation An algebric differential equation A linear partial differential equation A non-linear partial differential equation TRUE ANSWER : ? YOUR ANSWER : ?
A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is 1 0.33 Data insufficient, can't be predicted 0.5 TRUE ANSWER : ? YOUR ANSWER : ?
The excess energy of the reactants required to dissociate into products is known as the __________ energy. Threshold Activation Thermal Binding TRUE ANSWER : ? YOUR ANSWER : ?
In an ideal mixed reactor (at steady state), the Composition throughout the reactor remains same Space time is equivalent to holding time for constant density systems All of these Exit stream has the same composition as the fluid within the reactor TRUE ANSWER : ? YOUR ANSWER : ?
With increase in the order of reaction (for all positive reaction orders), the ratio of the volume of mixed reactor to the volume of plug flow reactor (for identical feed composition, flow rate and conversion) Increases Decreases Increases linearly Remains same TRUE ANSWER : ? YOUR ANSWER : ?
For the gaseous reaction 2A → B, where the feed consists of 50 mole % A and 50 mole % inerts, the expansion factor is -0.25 1 -0.5 TRUE ANSWER : ? YOUR ANSWER : ?
The residence time distribution of an ideal CSTR is 1/τ (-t/τ) Τ exp (-t/τ) 1/τ exp (-t/τ) Exp(-t/τ) TRUE ANSWER : ? YOUR ANSWER : ?