Chemical Reaction Engineering MCQ Questions & Answers

Section 1 Section 2 Section 3 Section 4 Section 5

1.
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and $${{\text{k}}_{\text{g}}}$$ respectively. The effective rate constant (k_eff) is given by

A. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\text{k}} + {{\text{k}}_{\text{g}}}$$

B. $${{\text{k}}_{\text{e}}}{\text{ff}} = \frac{{{\text{k}} + {{\text{k}}_{\text{g}}}}}{2}$$

C. $${{\text{k}}_{\text{e}}}{\text{ff}} = {\left( {{\text{k}}{{\text{k}}_{\text{g}}}} \right)^{\frac{1}{2}}}$$

D. $$\frac{1}{{{{\text{k}}_{\text{e}}}{\text{ff}}}} = \frac{1}{{\text{k}}} + \frac{1}{{{{\text{k}}_{\text{g}}}}}$$

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2.
The half life period of a first order reaction is given by (where, K = rate constant. )

A. 1.5 K

B. 2.5 K

C. $$\frac{{0.693}}{{\text{K}}}$$

D. 6.93 K

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3.
Catalyst is a substance, which __________ chemical reaction.

A. Increases the speed of a

B. Decreases the speed of a

C. Can either increase or decrease the speed of a

D. Alters the value of equilibrium constant in a reversible

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4.
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

A. $$ \propto {\text{CA}}$$

B. $$ \propto \frac{1}{{{\text{CA}}}}$$

C. Independent of temperature

D. None of these

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5.
Higher free energy of activation of a chemical reaction (at a given temperature) implies

A. Slower rate of reaction

B. Higher rate of reaction

C. Higher equilibrium conversion

D. Both B and C

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6.
If the rate of a chemical reaction becomes slower at a given temperature, then the

A. Initial concentration of the reactants remains constant

B. Free energy of activation is lower

C. Entropy changes

D. Free energy of activation is higher

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7.
The eddy diffusivity for a liquid in plug flow must be

A. 1

B. 0

C. ∞

D. Between 0 and 1

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8.
The most suitable reactor for carrying out an auto-thermal reaction is a

A. Batch reactor

B. CSTR

C. Semi-batch reactor

D. Plug-flow reactor

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9.
In an ideal tubular-flow reactor

A. There is no mixing in longitudinal direction

B. Mixing takes place in radial direction

C. There is a uniform velocity across the radius

D. All of the above

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10.
A reactor is generally termed as an autoclave, when it is a

A. High pressure batch reactor

B. Atmospheric pressure tank reactor

C. High pressure tubular reactor

D. Atmospheric pressure CSTR

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering

1. A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and $${{\text{k}}_{\text{g}}}$$ respectively. The effective rate constant (keff) is given by

Answer & Solution

2. The half life period of a first order reaction is given by (where, K = rate constant. )

Answer & Solution

3. Catalyst is a substance, which __________ chemical reaction.

Answer & Solution

4. A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

Answer & Solution

5. Higher free energy of activation of a chemical reaction (at a given temperature) implies

Answer & Solution

6. If the rate of a chemical reaction becomes slower at a given temperature, then the

Answer & Solution

7. The eddy diffusivity for a liquid in plug flow must be

Answer & Solution

8. The most suitable reactor for carrying out an auto-thermal reaction is a

Answer & Solution

9. In an ideal tubular-flow reactor

Answer & Solution

10. A reactor is generally termed as an autoclave, when it is a

Answer & Solution

Read More Section(Chemical Reaction Engineering)

1.
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and $${{\text{k}}_{\text{g}}}$$ respectively. The effective rate constant (k_eff) is given by

2.
The half life period of a first order reaction is given by (where, K = rate constant. )

3.
Catalyst is a substance, which __________ chemical reaction.

4.
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

5.
Higher free energy of activation of a chemical reaction (at a given temperature) implies

6.
If the rate of a chemical reaction becomes slower at a given temperature, then the

7.
The eddy diffusivity for a liquid in plug flow must be

8.
The most suitable reactor for carrying out an auto-thermal reaction is a

9.
In an ideal tubular-flow reactor

10.
A reactor is generally termed as an autoclave, when it is a