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Course: Edexcel Igcse Chemistry Modular — UNIT 2
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Edexcel Igcse Chemistry Modular — UNIT 2

Unit 2 · Bonding & Electrolysis

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Unit 2 · Inorganic Chemistry

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Unit 2 · Physical Chemistry

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Unit 2 · Organic Chemistry

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Quiz

Reversible reactions & equilibria – Check yourself

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Reversible reactions & equilibria Edexcel O Level Modular Chemistry check yourself quiz: free practice for Edexcel Modular – OL (chemistry). Work through this Reversible reactions & equilibria Edexcel O Level Modular Chemistry check yourself quiz and get instant feedback on every answer. If you get stuck, review the 3c Reversible reactions and equilibria — Notes lesson. More practice: Edexcel Modular – OL (chemistry) — all units. Syllabus: Pearson Edexcel International GCSEs.

  • Questions count: 9
  • Passing grade: B+
  • Time limit: 10 minutes
Start Quiz
1.
Which statement about dynamic equilibrium is correct?
Both reactions have stopped
Concentrations of reactants and products are equal
Forward and backward rates are equal
Only the forward reaction occurs
2.
The forward reaction of an equilibrium is endothermic. What happens if temperature is raised?
No change
Shifts left
Reaction stops
Shifts right
3.
For N2 + 3H2 ⇌ 2NH3, what does increasing pressure do?
Shifts right, more NH3
Shifts left, less NH3
No effect
Makes the reaction endothermic
4.
What is the effect of a catalyst on an equilibrium?
Increases yield of products
Equilibrium reached faster, position unchanged
Shifts equilibrium left
Only speeds up the forward reaction
5.
Why must a system be closed to reach dynamic equilibrium?
To keep the temperature constant
To stop the catalyst escaping
So no reactants or products can escape
So pressure is always high
6.
Which statement best describes Backward reaction?
The reaction going from products back to reactants (right to left).
A reaction that takes in heat energy from the surroundings.
The state in a reversible reaction where forward and backward rates are equal and concentrations stay constant.
A reaction in which the products can react to re-form the reactants.
7.
Which statement best describes Reversible reaction?
A reaction that transfers heat energy to the surroundings.
A system in which no substances can enter or leave.
A substance that speeds up both forward and backward reactions equally without being used up.
A reaction in which the products can react to re-form the reactants.
8.
Which statement best describes Closed system?
A system in which no substances can enter or leave.
The reaction going from products back to reactants (right to left).
The reaction going from reactants to products (left to right).
A substance that speeds up both forward and backward reactions equally without being used up.
9.
Which statement best describes Endothermic?
A substance that speeds up both forward and backward reactions equally without being used up.
A reaction that takes in heat energy from the surroundings.
The reaction going from products back to reactants (right to left).
The state in a reversible reaction where forward and backward rates are equal and concentrations stay constant.
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Part of Unit 2 · Physical Chemistry — see every lesson and quiz in this unit.
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