Chemical Reaction Engineering MCQs

Question 1

For a first order chemical reaction, the rate constant

Accepted Answer

Has unit of time-1

Answer

Changes on changing the concentration units

Answer

Is not a function of the unit of time

Answer

None of these

Question 2

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

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Becomes infinite

Question 3

If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst

Accepted Answer

Porosity is of less importance

Answer

Porosity is very important

Answer

Internal surface area is utilised efficiently

Answer

None of these

Question 4

Oil is hydrogenated using nickel catalyst in a __________ reactor.

Accepted Answer

Slurry

Answer

Batch

Answer

Fluidised bed

Answer

Fixed bed

Question 5

Exposure of a photographic plate to produce a latent image is an example of __________ reaction.

Accepted Answer

Both B and C

Answer

Very slow

Answer

Very fast

Answer

Photochemical

Question 6

An autothermal reactor is

Accepted Answer

Completely self-supporting in its thermal energy requirements

Answer

Most suitable for a second order reaction

Answer

Most suitable for a reversible reaction

Answer

Isothermal in nature

Question 7

A reaction which is catalysed by an acid is also catalysed by any substance, which has a tendency to

Accepted Answer

Lose a proton

Answer

Gain a proton

Answer

Lose an electron

Answer

None of these

Question 8

Thermodynamic equilibrium constant in a system is affected by

Accepted Answer

Temperature

Answer

Inerts

Answer

Pressure

Answer

All of the above

Question 9

With increase in temperature, the rate constant obeying Arhenious equation

Accepted Answer

Increases

Answer

Decreases

Answer

Decreases exponentially

Answer

Can either increase or decrease ; depends on the frequency factor