7741. When an exothermic reversible reaction is conducted adiabatically, the rate of reaction
Continuously increases
Continuously decreases
Passes through a maximum
Passes through a minimum
✅ The correct answer is option C.
Chemical Engineering
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7742. Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.
Mixed
Integral (plug flow)
Differential (flow)
Either A, B and C
✅ The correct answer is option D.
7744. The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reaction with low activation energy are
Always irreversible
Insensitive to temperature changes
Mostly irreversible
Highly temperature sensitive
✅ The correct answer is option B.
7745. The rate constant of a chemical reaction decreases by decreasing the
Pressure
Concentration of reactants
Temperature
Duration of reaction
✅ The correct answer is option C.
7746. A catalyst promoter
Improves the activity of a catalyst
Acts as a catalyst support
Itself has very high activity
All of the above
✅ The correct answer is option A.
7747. The equilibrium constant K of a chemical reaction depends on
Temperature only
Pressure only
Temperature and pressure
Ratio of reactants
✅ The correct answer is option A.
7748. Chemical reaction rate of a component depends upon the
Composition of the component only
Temperature of the system
Pressure of the system
All of the above
✅ The correct answer is option D.
7749. 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
Remains same
Increases linearly
✅ The correct answer is option A.
7750. The reason why a catalyst increases the rate of reaction is that, it
Decreases the energy barrier for reaction
Increases the activation energy
Decreases the molecular collision diameter
None of these
✅ The correct answer is option A.