Explore topic-wise MCQs in Chemical Reaction Engineering.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

In the formation of phosgene from carbon monoxide and chlorine, which of the following is rate determining?

A. Decomposition of chlorine
B. Formation of COCl.
C. Reaction of COCl. with Cl<sub>2</sub>
D. Decomposition of CO<sub>2</sub>
Answer» D. Decomposition of CO<sub>2</sub>
Discussion
2.

Formation of hydrogen iodide from the corresponding elements is a ____

A. Single step mechanism
B. Two step mechanism
C. Three step mechanism
D. Four step mechanism
Answer» C. Three step mechanism
Discussion
3.

State true or false.Decomposition of nitrogen pentoxide follows second order mechanism, assuming that the kinetics is controlled by a single step mechanism.

A. True
B. False
Answer» C.
Discussion
4.

State true or false.Gas phase decomposition of N2O follows first order mechanism for low concentrations of N2O and second order mechanism for high concentrations of N2O.

A. True
B. False
Answer» B. False
Discussion
5.

At very low concentrations of azomethane, its decomposition follows which order?

A. First order
B. Zero order
C. Third order
D. Second order
Answer» E.
Discussion
6.

The order of the reaction involving the conversion of ozone to oxygen is ____

A. Zero order
B. First order
C. Second order
D. Third order
Answer» C. Second order
Discussion
7.

The reaction involving oxidation of nitric oxide to nitrous oxide follows the mechanism ____

A. ( frac{-dO_2}{dt} ) = k[NO<sub>2</sub>]<sup>2</sup>[O<sub>2</sub>]
B. ( frac{-dO_2}{dt} ) = k[NO<sub>2</sub>][O<sub>2</sub>]
C. ( frac{-dO_2}{dt} ) = k[NO<sub>2</sub>]<sup>2</sup>[O<sub>2</sub>]<sup>2</sup>
D. ( frac{-dO_2}{dt} ) = k[NO<sub>2</sub>][O<sub>2</sub>]<sup>2</sup>
Answer» B. ( frac{-dO_2}{dt} ) = k[NO<sub>2</sub>][O<sub>2</sub>]
Discussion
8.

An assumption of Steady State Approximation is ____

A. Reaction occurs without the formation of intermediates
B. Catalyst does not accelerate reaction rate
C. One of the intermediates in the reaction is consumed as quickly as it is generated
D. Equilibrium state is attained at the end of a reaction
Answer» D. Equilibrium state is attained at the end of a reaction
Discussion
9.

The rate determining step of a series of reactions is the one ____

A. That is fastest
B. That is slowest
C. That does not contribute to the reaction
D. That does not occur
Answer» C. That does not contribute to the reaction
Discussion
10.

For the parallel reaction A B and A C, of rate constants k1 and k2 respectively, both reactions of order 1, the rate expression is given as ____

A. (-r<sub>A</sub>) = k<sub>1</sub>C<sub>A</sub> + k<sub>2</sub>C<sub>A</sub>
B. (-r<sub>A</sub>) = k<sub>1</sub>C<sub>A</sub> k<sub>2</sub>C<sub>A</sub>
C. (-r<sub>A</sub>) = k<sub>2</sub>C<sub>A</sub>
D. (-r<sub>A</sub>) = k<sub>1</sub>C<sub>A</sub>
Answer» B. (-r<sub>A</sub>) = k<sub>1</sub>C<sub>A</sub> k<sub>2</sub>C<sub>A</sub>
Discussion