Which of the following is not a chemical step in a fluid solid catalytic reaction? Adsorption Desorption None of these Surface chemical reaction TRUE ANSWER : ? YOUR ANSWER : ?
A catalyst in a chemical reaction __________ free energy change in the reaction. Neither A nor B Either A or B; depends on the type of catalyst Increases Decreases TRUE ANSWER : ? YOUR ANSWER : ?
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in Blood Intestine Gland Saliva TRUE ANSWER : ? YOUR ANSWER : ?
Effectiveness factor of a catalyst pellet is a measure of the __________ resistance. None of these Pore diffusion Gas film Chemical reaction TRUE ANSWER : ? YOUR ANSWER : ?
Oil is hydrogenated using nickel catalyst in a __________ reactor. Batch Fluidised bed Fixed bed Slurry TRUE ANSWER : ? YOUR ANSWER : ?
An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature. Is always greater than Is always less than Is always equal to May be greater or less than TRUE ANSWER : ? YOUR ANSWER : ?
BET apparatus Is made entirely of stainless steel None of these Measures the catalyst surface area directly Operates at very high pressure TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature? Diameter of the reactor Time Useful volume of the tank None of these TRUE ANSWER : ? YOUR ANSWER : ?
With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will Data in insufficient; can't be predicted Increase Decrease Remain same TRUE ANSWER : ? YOUR ANSWER : ?
For a first order chemical reaction in a porous catalyst, the Thiele modulus is 10. The effectiveness factor is approximately equal to 0.5 0.1 1 TRUE ANSWER : ? YOUR ANSWER : ?