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Chemical Equilibrium /
Quiz 1

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HEC ETC - USAT M Entry Test - Chemistry - Chemical Equilibrium - Quiz 1

Practice 10 high yield MCQs on Chemistry from Chapter Chemical Equilibrium for USAT M Entry Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 1 of the series.

1. What is a reversible reaction?

Reaction that proceeds in both forward and backward directions
Reaction that proceeds only in forward direction
Reaction in which one element displaces another
Reaction in which a compound breaks down

2. What is chemical equilibrium?

Rates of forward and reverse reactions are equal
Reactants are completely converted to products
Products are completely converted to reactants
No reaction occurs

3. What happens to concentrations at equilibrium?

Are equal
Are zero
Remain constant
Are maximum

4. What is dynamic equilibrium?

Static equilibrium
One-way reaction
Irreversible reaction
Dynamic equilibrium

5. What is the equilibrium constant (Kc)?

Ratio of product concentrations to reactant concentrations
Ratio of reactant concentrations to product concentrations
Product of reactant concentrations
Sum of product concentrations

6. What is the expression for Kc?

Kc = [C][D]/[A][B]
Kc = [C]^c[D]^d/[A]^a[B]^b
Kc = [A]^a[B]^b/[C]^c[D]^d
Kc = [A][B]/[C][D]

7. What does a large value of Kc indicate?

Mostly reactants
Equal amounts of reactants and products
Mostly products
No reaction

8. What does a small value of Kc indicate?

Mostly products
Equal amounts of reactants and products
Complete reaction
Mostly reactants

9. What does Kc depend on?

Only on temperature
Only on concentration
Only on pressure
Only on catalyst

10. What does Le Chatelier's principle state?

System shifts to counteract the disturbance
System shifts to increase the disturbance
System remains unchanged
System breaks down

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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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