7681. Which of the following is not a unit of reaction rate?
Moles for med/(surface of catalyst) (time)
Moles formed/volume of reactor) (time)
Mole formed/volume of catalyst) (time)
None of these
✅ The correct answer is option D.
Chemical Engineering
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7682. The rate at which a chemical substance reacts is proportional to its
Active mass
Molecular weight
Equivalent weight
Atomic weight
✅ The correct answer is option A.
7683. The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to
D
√d
D1.5
D2
✅ The correct answer is option A.
7684. What is the value of ‘n’ if the reaction rate of the chemical reaction A → B, is proportional to CAn and it is found that the reaction rate triples, when the concentration of ‘A’ is increased 9 times ?
1-Feb
1-Mar
1-Sep
3
✅ The correct answer is option A.
7685. With increase in the space time of an irreversible isothermal reaction being carried out in a P.F. reactor, the conversion will
Increase
Decrease
Remain same
Data in insufficient; can’t be predicted
✅ The correct answer is option A.
7686. A typical example of an exothermic reversible reaction conducted at high pressure in industry is
Dehydration of ethanol
Methanol synthesis
Reformation of methane
Polymerisation of ethylene
✅ The correct answer is option A.
7687. For a fluidised bed reactor, the most suitable/relevant model is a __________ model.
Tank in series
Bubbling bed
Plug flow
None of these
✅ The correct answer is option B.
7688. The eddy diffusivity for a liquid in plug flow must be
1
0
∞
Between 0 and 1
✅ The correct answer is option B.
7689. Ionic reactions occur in
Solid state only
Liquid state only
Solutions
Any state
✅ The correct answer is option C.
7690. Rate of a chemical reaction is not affected by the
Catalyst
Temperature
Reactant’s concentration
Number of molecules of reactants taking part in the reaction
✅ The correct answer is option D.