CPT Chemical Process Fundamentals & Reactions

Question 1

What does Le Chatelier's Principle state about a chemical system at equilibrium?

Accepted Answer

The system will shift to counteract any stress applied to it

Answer

Le Chatelier's Principle states that if a stress (temperature, pressure, concentration change) is applied to an equilibrium system, it will shift to partially oppose that stress.

Question 2

Which of the following best describes an exothermic chemical reaction?

Accepted Answer

A reaction that releases heat into the surroundings

Answer

An exothermic reaction releases energy (heat) into the surroundings, resulting in a negative enthalpy change (ΔH < 0).

Question 3

What is the primary role of a catalyst in a chemical reaction?

Accepted Answer

It lowers the activation energy without being consumed

Answer

A catalyst lowers the activation energy of a reaction, speeding it up without being consumed or altering the equilibrium position.

Question 4

In a process plant, pH is a measure of which property of an aqueous solution?

Accepted Answer

Hydrogen ion (H⁺) activity or acidity/basicity

Answer

pH measures the hydrogen ion (H⁺) activity in solution; values below 7 are acidic, above 7 are basic, and 7 is neutral.

Question 5

Which statement correctly distinguishes a physical change from a chemical change?

Accepted Answer

Physical changes alter form or state without producing new substances

Answer

A physical change alters the form, size, or state of matter without creating new chemical substances, while a chemical change produces new substances.

(CPT) Certified Process Technician Practice Test

(CPT) Certified Process Technician Practice Test

CPT Chemical Process Fundamentals & Reactions