WACE Chemistry ATAR Practice Questions - WACE Year 12 ATAR Chemistry (Units 3 & 4) Exam - WACE Chemistry ATAR Practice Questions - WACE Year 12 ATAR Chemistry (Units 3 & 4) Exam

Question 1

Which of the following statements correctly describes a chemical system at dynamic equilibrium?

The rates of the forward and reverse reactions are equal and non-zero. The concentrations of reactants and products are equal to one another. All chemical reactions within the vessel have completely stopped. The total mass of products is greater than the total mass of reactants.

Correct Answer:

The rates of the forward and reverse reactions are equal and non-zero.

Question 2

What effect does adding a positive catalyst have on a system at dynamic equilibrium?

It increases the yield of products by shifting the position of equilibrium. It increases the equilibrium constant (Kc) value. It increases both forward and reverse reaction rates equally without shifting equilibrium. It decreases the rate of the reverse reaction while increasing the forward rate.

Correct Answer:

It increases both forward and reverse reaction rates equally without shifting equilibrium.

Question 3

For the gaseous equilibrium N2(g) + 3H2(g) 2NH3(g) (exothermic), what change will shift the equilibrium position to the right?

Increasing the temperature of the reaction vessel at constant volume. Decreasing the total pressure of the vessel by increasing volume. Increasing the concentration of N2(g) at constant temperature. Removing H2(g) continuously from the system.

Correct Answer:

Increasing the concentration of N2(g) at constant temperature.

Question 4

Which species acts as the Bronsted-Lowry acid in the reaction: HCO3-(aq) + H2O(l) H2CO3(aq) + OH-(aq)?

HCO3-(aq) H2O(l) H2CO3(aq) OH-(aq)

Correct Answer:

H2O(l)

Question 5

What is the conjugate base of the hydrogen phosphate ion, HPO4^2-?

H2PO4- H3PO4 PO4^3- P2O7^4-

Correct Answer:

PO4^3-

Question 1

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Prepare with the WACE Chemistry ATAR Practice Questions - WACE Year 12 ATAR Chemistry (Units 3 & 4) Exam practice quiz. This question bank includes 100 questions covering solution, acid, equilibrium, mol-1, and reaction. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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WACE Chemistry ATAR Practice Questions - WACE Year 12 ATAR Chemistry (Units 3 & 4) Exam

This practice set contains 100 questions from the matching question bank and focuses on solution, acid, equilibrium, mol-1, and reaction. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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WACE Chemistry ATAR Practice Questions - WACE Year 12 ATAR Chemistry (Units 3 & 4) Exam

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