Chemical Reaction Engineering - Chemical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The reactions of high molecularity are rare, because

of very large activation energy of many bodies.

of low probability of many body collisions.

many body collisions are not favoured energetically.

of requirement of very large concentration for such reactions.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Which of the following is the most suitable for isothermal operation ?

Batch reactor

Back-mix reactor

Plug-flow reactor

Fixed bed reactor

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

For a first order chemical reaction, the rate constant

changes on changing the concentration units.

is not a function of the unit of time.

has unit of time^-1.

none ofthese.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Which of the following is an autocatalytic reaction ?

Photochemical reactions

Microbial fermentation reaction

Enzyme fermentation reaction

Ammonia synthesis reaction

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The performance of a cascade of CSTR's can be improved by adding

a P.F. reactor in series.

a P.F. reactor in parallel.

more CSTR's in series.

more CSTR's in parallel.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A multiple reaction may be classified as a __________ reaction.

consecutive or side

parallel or side

mixed

all (a), (b) and (c)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Holding time for flow reactors is __________ the space time, for constant fluid density

double

triple

equal to

none of these.

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Pick out the wrong statement.

In a multistep reaction, the slowest step is the rate determining step.

In general, the rate of a reaction becomes triple for every 10°C rise in temperature.

Slow chemical reactions have generally high values of activation energy.

Molecularity of a reaction can not be zero but the order of a reaction can be zero.