Lesson 4.6.2.1
4.6.2.1 Reversible reactions Quiz: AQA Chemistry, Unit 6
20 questions
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Lesson 4.6.2.1, Reversible reactions: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 6: The rate and extent of chemical change, written with Revision Ninja.
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The 20 questions
-
In a reversible reaction, the products can react to produce:
- Catalysts
- Solvents
- Gases only
- The original reactants
-
How can the direction of a reversible reaction be changed?
- Heating only
- Adding an indicator
- Changing the conditions
- Removing the catalyst
-
Which symbol represents a reversible reaction in a chemical equation?
- Equals sign
- Single arrow
- Plus sign
- Double arrow
-
In A + B ⇌ C + D, what can C and D react to form?
- A and B
- Water
- Carbon dioxide
- Oxygen
-
Which process is a classic example of a reversible chemical change?
- Cooking an egg
- Hydrating copper sulfate
- Burning wood
- Rusting iron
-
What determines the direction in which a reversible reaction proceeds?
- Catalyst mass
- Reaction conditions
- Container colour
- Initial volume
-
Why is controlling reversible reactions important in industrial chemistry?
- Removes catalysts
- Eliminates energy
- Maximises desired product
- Stops all reactions
-
In a reversible reaction, what are the products of the forward reaction acting as?
- Impurities
- Reverse reactants
- Catalysts
- By-products
-
How is an irreversible reaction best described?
- Cannot be reversed
- Uses no energy
- Always reaches equilibrium
- Requires catalysts
-
In A + B ⇌ C + D, what is the forward reaction?
- A + B to C + D
- A to B
- C to D
- C + D to A + B
-
What does the reverse reaction in a reversible system convert?
- Reactants to products
- Elements to atoms
- Products to reactants
- Catalysts to heat
-
What defines a reversible chemical reaction?
- Stops immediately
- Runs both ways
- Needs no energy
- Releases no heat
-
What colour change occurs when water is added to anhydrous copper sulfate?
- Dissolves without colour
- Turns blue
- Turns green
- Turns black
-
Which statement describes the reverse of the reaction X -> Y?
- Neither reaction
- Y -> X
- X + Y
- X -> Y
-
What property of reversible reactions allows chemists to control product yield?
- Fixed pressure
- Infinite mass
- Constant temperature
- Conditions alter direction
-
Which equation shows a reversible reaction?
- A + B ⇌ C + D
- H2 + Cl2 -> 2HCl
- Zn + 2HCl -> ZnCl2 + H2
- 2Mg + O2 -> 2MgO
-
What colour is anhydrous copper sulfate?
- Green
- White
- Black
- Blue
-
What is the reverse of hydration?
- Dehydration
- Neutralisation
- Hydration
- Electrolysis
-
In A + B ⇌ C + D, which species are the reactants in the forward direction?
- C and D
- A and C
- A and B
- B and D
-
Which term describes a reaction whose products can reform the reactants?
- Catalysed
- Reversible
- Exothermic
- Irreversible
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