Chemical Reaction Engineering MCQ Questions & Answers

1

A photochemical reaction is

A) Accompanied with emission of light B) Catalysed by light C) Initiated by light D) All of the above

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Answer & Solution

Answer: Option C

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2

A rise in temperature

A) Normally tends to increase the reaction rate B) Does not affect a catalysed reaction C) Does not affect photo-chemical reaction rates D) All of the above

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Answer & Solution

Answer: Option D

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3

Pick out the wrong statement pertaining to space velocity of flow reactors.

A) The unit of space velocity is (time)^-1 B) The space velocity of 3 hr^-1 means that three reactor volumes of feed at specified conditions are being fed into the reactor every hour C) The space velocity of 3 hr^-1 means that one third reactor volume of feed at specified conditions are being fed into the reactor D) None of these

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Answer & Solution

Answer: Option C

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4

A first order reaction A → B occurs in an isothermal porous catalyst pellet of spherical shape. If the concentration of A at the centre of the pellet is much less than at the external surface, the process is limited by

A) Diffusion within the pellet B) Reaction C) External mass transfer D) None of the above

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Answer & Solution

Answer: Option A

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5

Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N₂ + 3H₂ ⇋ 2NH₃.

A) Increases B) Decreases C) Remains unchanged D) Unpredictable from the data

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Answer & Solution

Answer: Option A

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6

Half life period of a chemical reaction is proportional to C_A₀^-1, if the reaction is of __________ order.

A) First B) Zero C) Second D) Third

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Answer & Solution

Answer: Option C

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7

The unit of frequency factor in Arhenious equation is

A) Same as that of rate constant B) Same as that of activation energy C) Dimensionless D) None of these

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Answer & Solution

Answer: Option A

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8

The rate of reaction of a/an __________ reaction is not affected by temperature rise.

A) Autocatalytic B) Photochemical C) Consecutive D) Zero order

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Answer & Solution

Answer: Option B

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9

For a first order chemical reaction, the rate constant

A) Changes on changing the concentration units B) Is not a function of the unit of time C) Has unit of time^-1 D) None of these

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Answer & Solution

Answer: Option C

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10

When a catalyst increases the rate of chemical reaction, the rate constant

A) Decreases B) Increases C) Remains constant D) Becomes infinite

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Answer & Solution

Answer: Option B

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering