1. Vera is studying chemical equilibrium. She learns that a closed system is essential. What is a closed system?
Back to dashboard
Reading mode
Chapter 9: Chemical Equilibrium + Chapter 10: Acids, Bases and Salts
Correct answer is shown on each question. Use Next to read one by one.
Question 1 of 10
0% read
2. A reversible reaction is one that:
3. Ibrahim is learning about the conditions for equilibrium. He understands that temperature can affect the position of equilibrium. According to Le Chatelier's principle, how does an increase in temperature affect an endothermic reaction?
4. Qasim is learning about dynamic equilibrium. He knows that at equilibrium, the system is in balance. What does the term 'dynamic' in dynamic equilibrium refer to?
5. Quinn is learning about alkalis. He knows that all alkalis are bases, but not all bases are alkalis. Which of the following is a base but not an alkali?
6. Bongani is studying the effect of a catalyst on equilibrium. He learns that a catalyst speeds up both the forward and reverse reactions equally. What is the effect of a catalyst on the equilibrium position?
7. Patricia is studying the Bronsted-Lowry concept. She knows that a conjugate acid is formed when a base accepts a proton. In the reaction: NH3 + H2O → NH4+ + OH-, what is the conjugate acid?
8. Which type of reaction can establish equilibrium?
9. Ahmed is studying the properties of acids. He knows that acids produce hydrogen ions (H+) when dissolved in water. According to the Arrhenius concept, which of the following is an acid?
10. Zayn is studying chemical equilibrium. He learns that the equilibrium constant (K) for a reaction is constant at a given temperature. If K is very large, what does it indicate about the reaction?