For a fluidised bed reactor, the most suitable/relevant model is a __________ model. Plug flow Tank in series Bubbling bed None of these TRUE ANSWER : ? YOUR ANSWER : ?
The concentration of A in a first order reaction, A → B, decreases Very abruptly towards the end of the reaction Logarithmically with time Exponentially with time Linearly with time TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a theory of homogeneous reaction? Chain reaction theory None of these Radiation hypothesis Collision theory and activated complex theory TRUE ANSWER : ? YOUR ANSWER : ?
The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line? XA Vs . τ XA/(1 - XA)Vs τ XA(1 - XA)Vs τ XA Vs ln τ TRUE ANSWER : ? YOUR ANSWER : ?
The performance equations for constant density systems are identical for Batch reactor and backmix reactor P.F.R. and batch reactor P.F.R, batch reactor and backmix reactor P.F.R. and backmix reactor TRUE ANSWER : ? YOUR ANSWER : ?
Pick out the wrong statement pertaining to space velocity of flow reactors. The space velocity of 3 hr⁻¹ means that one third reactor volume of feed at specified conditions are being fed into the reactor The space velocity of 3 hr⁻¹ means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour The unit of space velocity is (time)⁻¹ None of these TRUE ANSWER : ? YOUR ANSWER : ?
Higher free energy of activation of a chemical reaction (at a given temperature) implies Higher rate of reaction Both B and C Higher equilibrium conversion Slower rate of reaction TRUE ANSWER : ? YOUR ANSWER : ?
Promoter. Atlers the position of equilibrium in a reversible reaction Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals Initiates a chemical reaction and is a catalyst by itself All of these TRUE ANSWER : ? YOUR ANSWER : ?
For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance. Either A, B or C Chemical reaction Film diffusion Diffusion through ash layer TRUE ANSWER : ? YOUR ANSWER : ?