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.Management Sciences
Category: Chemical Reaction
A Catalyst ____________________?
A. Increases the equilibrium concentration of the product
B. Changes the equilibrium constant of the reaction
C. Shortens the time to reach the equilibrium
D. None of these
Velocity of a chemical reaction___________________?
A. Decreases with increase in temperature
B. Increases with increase of pressure of reactants for all reactions
C. Decreases with increase of reactant concentration
D. None of these
A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length ?
A. Decreases
B. Increases
C. Is at the highest allowable temperature throughout
D. First increases and then decreases
In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is___________________?
A. More
B. Less
C. Same
D. Either A. or B., depends on other factors
Conversion increases with increase in temperature in case of a/an ______________ reaction?
A. Autocatalytic
B. Irreversible
C. Reversible endothermic
D. Reversible exothermic
The reactions with low activation energy are _____________________?
A. Always spontaneous
B. Slow
C. Fast
D. Non-spontaneous
Which of the following is the most suitable for isothermal operation?
A. Batch reactor
B. Back-mix reactor
C. Plug-flow reactor
D. Fixed bed reactor
With increase in temperature, the rate constant obeying Arrhenius equation____________________?
A. Increases
B. Decreases
C. Decreases exponentially
D. Can either increase or decrease; depends on the frequency factor
Pick out the wrong statement?
A. In a first order reaction, A → products; the reaction becomes slower as it proceeds, because
the concentration of A decreases and the rate is proportional to the concentration of A
B. Transition state theory approaches the problem of calculating reaction rates by concentrating
on the idea of activated complexes
C. According to the penetration theory, the mass transfer co-efficient decreases, if the exposure
time of an eddy to the solute decreases
D. If the rate of an irreversible reaction, A + B → 2C is k.CA.CB, then the reaction is always
elementary
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