Unit 3 AOS 2 Chemistry - Key Knowledge questions

Unit 3 AOS 2 Chemistry - Key Knowledge questions

12th Grade

20 Qs

quiz-placeholder

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Unit 3 AOS 2 Chemistry - Key Knowledge questions

Unit 3 AOS 2 Chemistry - Key Knowledge questions

Assessment

Quiz

Chemistry

12th Grade

Medium

Created by

Barry Fleming

Used 2+ times

FREE Resource

20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following factors does NOT affect the rate of a chemical reaction?

Temperature

Surface area

Concentration

Atomic number

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

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

To increase the yield of products

To lower the activation energy

To change the equilibrium constant

To increase the reaction temperature

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In an energy profile diagram, how does a catalyst affect the activation energy?

It increases the activation energy

It decreases the activation energy

It has no effect on the activation energy

It eliminates the activation energy completely

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of the following best describes a reversible reaction?

A reaction that cannot be undone

A reaction that proceeds in only one direction

A reaction that can proceed in both forward and reverse directions

A reaction that always reaches completion

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In a homogeneous equilibrium involving aqueous solutions, what does the double arrow (⇌) in the chemical equation represent?

The reaction is irreversible

The forward and reverse reactions are occurring simultaneously

The reaction is incomplete

The reaction is exothermic

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

According to Le Chatelier's principle, how would an increase in temperature affect an exothermic equilibrium reaction?

It would shift the equilibrium to the right

It would shift the equilibrium to the left

It would have no effect on the equilibrium

It would increase the equilibrium constant

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What does the equilibrium constant (K) represent?

The rate of the forward reaction

The rate of the reverse reaction

The ratio of products to reactants at equilibrium

The activation energy of the reaction

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