Explore topic-wise MCQs in Chemistry.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

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

A. τ = θ , when the fluid density changes in the reactor.
B. τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant.
C. τ and θ are always equal.
D. τ = θ , for a non-isothermal reactor.
Answer» C. τ and θ are always equal.
Discussion
2.

The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises form 10 to 100°C.

A. 112
B. 612
C. 512
D. 256
Answer» D. 256
Discussion
3.

N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions.

A. any
B. first
C. three
D. second
Answer» B. first
Discussion
4.

The dimensions of rate constant for reaction 3A B are (l/gm mole)/min. Therefore the reaction order is

A. 0
B. 1
C. 3
D. 2
Answer» E.
Discussion
5.

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

A. 2
B. 24
C. 5
D. 6
Answer» D. 6
Discussion
6.

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. 32
D. 16
Answer» E.
Discussion
7.

The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

A. 8764°K
B. 8987°K
C. 9210°K
D. 8621°K
Answer» B. 8987°K
Discussion