10-minute Quiz : Chapter 39 Dynamic equilibrium

Quiz
•
Chemistry
•
9th - 12th Grade
•
Hard
Chemistry Aristo
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Consider the chemical equilibrium established in dilute potassium manganate solution (green) at room temperature and pressure. Which of the following statements about the solution is/are correct?
(1) The solution turns purple after a short time.
(2) The pH of the solution is greater than 7.
(3) The rate of consumption of MnO₄²⁻(aq) is equal to the rate of formation of MnO₄⁻(aq).
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Consider the concentration-time graph for a chemical system involving three gases X, Y and Z in a fixed-volume closed container kept at a certain temperature. Which of the following statements concerning this system is/are correct?
(1) At point P, X(g), Y(g) and Z(g) are all present in the system.
(2) At point Q, the system reaches a state of dynamic equilibrium.
(3) At point R, the reaction involving these three gases stops.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Refer to the experiment on the thermal decomposition of copper(II) carbonate. Upon heating, the green copper(II) carbonate decomposes completely to black copper(II) oxide and colourless carbon dioxide. Which of the following statements correctly explains the result?
D. This reaction is occurring in an open system.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Consider the concentration-time graph for the following reversible reaction:
N₂O₄(g) ⇌ 2NO₂(g)
Which of the following statements concerning this reaction is correct?
C. The reaction reaches the state of dynamic equilibrium at the 30ᵗʰ second.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In an experiment, 1.0 mol of hydrogen iodide is introduced into a 1.0 dm³ sealed tube maintained at 400°C. The hydrogen iodide decomposes reversibly to form hydrogen and iodine according to the following equation:
2HI(g) ⇌ H₂(g) + I₂(g)
Which of the following statements concerning this reaction is correct?
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