Explore topic-wise MCQs in Engineering Chemistry.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Threshold energy is the sum of ___________

A. Internal energy and external energy of reactants
B. Activation energy and external energy of reactants
C. Activation energy and internal energy of reactants
D. Activation energy and thermal energy
Answer» D. Activation energy and thermal energy
Discussion
2.

In a series of reactions, the rate determining step is ___________

A. Simplest
B. Fast and complex
C. Fastest
D. Slowest
Answer» E.
Discussion
3.

For a certain reaction, the rate = k[NO]2[O2], when the initial concentration of NO is tripled, the initial rate ___________

A. Increases by a factor of nine
B. Increases by a factor of three
C. Increases by a factor of six
D. Decreases by a factor of nine
Answer» B. Increases by a factor of three
Discussion
4.

Based on the collision model, the atoms at the top of the potential energy hill are called ___________

A. Transition state
B. Energetic atom
C. Steric factor
D. Activation energy
Answer» B. Energetic atom
Discussion
5.

Which concentration plot is linear for a first order reaction? (A is one of the reactant)

A. [A] versus time
B. [A]<sup>2</sup> versus time
C. Ln[A] versus time
D. [A] versus time
Answer» D. [A] versus time
Discussion