Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering Page-2 section-4

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11.
The irreversible reaction is a special case of reversible reaction, if the

A. Equilibrium constant is 1

B. Conversion of the reactant at equilibrium condition is zero

C. Reactant concentration at equilibrium condition is zero

D. All of the above

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12.
Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.

A. Pore diffusion

B. Gas film

C. Chemical reaction

D. None of these

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13.
In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume.

A. More than

B. Less than

C. Same as

D. Data insufficient; can't be predicted

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14.
A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield?

A. Large reactor followed by smaller one

B. Smaller reactor followed by larger one

C. Either of the arrangement A or B will give the same yield

D. Data insufficient, can't be predicted

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15.
For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

A. τ and θ are always equal

B. τ = θ , when the fluid density changes in the reactor

C. τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant

D. τ = θ , for a non-isothermal reactor

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16.
With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be

A. Higher in P.F. reactor

B. Higher in CSTR

C. Same in both the reactors

D. Data insufficient; can't be predicted

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17.
The fractional volume change of the system for the isothermal gas phase reaction, A → 3B, between no conversion and complete conversion is

A. 0.5

B. 1

C. 2

D. 3

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18.
The rate constant of a chemical reaction decreases by decreasing the

A. Pressure

B. Concentration of reactants

C. Temperature

D. Duration of reaction

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19.
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

A. CaO is not dissociated

B. CO₂ escapes continuously

C. Of high calcination temperature

D. CaO is more stable than CaCO₃

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20.
For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.

A. 8

B. 12

C. 16

D. 32

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering

11. The irreversible reaction is a special case of reversible reaction, if the

Answer & Solution

12. Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.

Answer & Solution

13. In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume.

Answer & Solution

14. A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield?

Answer & Solution

15. For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

Answer & Solution

16. With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be

Answer & Solution

17. The fractional volume change of the system for the isothermal gas phase reaction, A → 3B, between no conversion and complete conversion is

Answer & Solution

18. The rate constant of a chemical reaction decreases by decreasing the

Answer & Solution

19. Calcination reaction of limestone (CaCO3 → CaO + CO2) goes to completion in the rotary kiln, because

Answer & Solution

20. For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.

Answer & Solution

Read More Section(Chemical Reaction Engineering)

11.
The irreversible reaction is a special case of reversible reaction, if the

12.
Effectiveness factor of a catalyst pellet is a measure of the __________ resistance.

13.
In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume.

14.
A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield?

15.
For a tubular reactor with space time 'τ' and residence time 'θ', the following statement holds good.

16.
With the same reaction time, initial concentration and feed rate, the reaction 2A → B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be

17.
The fractional volume change of the system for the isothermal gas phase reaction, A → 3B, between no conversion and complete conversion is

18.
The rate constant of a chemical reaction decreases by decreasing the

19.
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

20.
For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.