Chemical Reactions Quiz
Test your knowledge of Chemical Reactions, as part of GCSE Chemistry with this quiz.
This quiz consists of 15 questions, including multiple-choice and short-answer questions on the topic of Chemical Reactions for GCSE Chemistry.
For multiple-choice questions, choose the correct answer. Scroll down to begin the quiz.
Questions
What must happen for a reaction to occur, according to collision theory?
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What effect does a catalyst have on a chemical reaction?
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Which reaction is exothermic?
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Which metal is the most reactive in the reactivity series?
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What is the term for a reaction that can go forwards and backwards under different conditions?
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What is meant by the term 'activation energy'?
Activation energy is the minimum amount of energy required for reactant particles to collide successfully and start a chemical reaction.
How does increasing temperature affect the rate of reaction?
Increasing temperature gives particles more energy, making them move faster and collide more frequently with greater energy, increasing the rate of reaction.
What is the reactivity series, and why is it useful?
The reactivity series is a list of metals arranged in order of their reactivity. It is useful for predicting how metals react with acids, water, and other substances.
Write a balanced symbol equation for the reaction of magnesium with hydrochloric acid.
Mg + 2HCl → MgCl₂ + H₂
How does a catalyst speed up a reaction?
A catalyst provides an alternative reaction pathway with lower activation energy, allowing more particles to react successfully.
What is an endothermic reaction? Give an example.
An endothermic reaction absorbs heat from the surroundings.
Example: Thermal decomposition of calcium carbonate.
Why does increasing the concentration of a solution increase the rate of reaction?
A higher concentration means more reactant particles are in the same volume, increasing the frequency of collisions.
What happens to the position of equilibrium if temperature is increased in an exothermic reaction?
The equilibrium shifts towards the reactants to oppose the increase in temperature.
Write the word equation for the reaction of iron with copper sulphate solution.
Iron + Copper sulphate → Iron sulphate + Copper
What effect does breaking a solid into smaller pieces have on the rate of reaction?
It increases the surface area, allowing more frequent collisions between reactant particles, speeding up the reaction.
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