PU E 2026 Chemical Equilibrium Free Quiz 1

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PU E 2026 Chemical Equilibrium Free Quiz 1

PU E Quiz

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Navigator 10 Q

General

General 10 MCQs

1. What is a reversible reaction?

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

2. What is chemical equilibrium?

A. Rates of forward and reverse reactions are equal B. Reactants are completely converted to products C. Products are completely converted to reactants D. No reaction occurs

3. What happens to concentrations at equilibrium?

A. Are equal B. Are zero C. Remain constant D. Are maximum

4. What is dynamic equilibrium?

A. Static equilibrium B. One-way reaction C. Irreversible reaction D. Dynamic equilibrium

5. What is the equilibrium constant (Kc)?

A. Ratio of product concentrations to reactant concentrations B. Ratio of reactant concentrations to product concentrations C. Product of reactant concentrations D. Sum of product concentrations

6. What is the expression for Kc?

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

7. What does a large value of Kc indicate?

A. Mostly reactants B. Equal amounts of reactants and products C. Mostly products D. No reaction

8. What does a small value of Kc indicate?

A. Mostly products B. Equal amounts of reactants and products C. Complete reaction D. Mostly reactants

9. What does Kc depend on?

A. Only on temperature B. Only on concentration C. Only on pressure D. Only on catalyst

10. What does Le Chatelier's principle state?

A. System shifts to counteract the disturbance B. System shifts to increase the disturbance C. System remains unchanged D. System breaks down

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