Welcome to the Quiz!
This quiz contains 7 questions from a mix of 1 subtopics.
What happens in an exothermic reaction?
energy is given out to the surroundings
energy is taken in from the surroundings
energy is neither taken in nor given out
energy is both taken in and given out
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What is the main characteristic of endothermic reactions?
they neither take in nor give out energy
they give out energy to their surroundings
they both take in and give out energy
they take in energy from their surroundings
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What is the role of a catalyst in a chemical reaction?
to speed up the reaction
to slow down the reaction
to change the products of the reaction
to stop the reaction
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What is the everyday use of endothermic reactions?
self-heating coffee cans
cold packs for sports injuries
hand warmers
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What is true about catalysts?
they increase the activation energy of the reaction
they are used up in the reaction
they can be reused multiple times
they change the products of the reaction
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What is the term for the energy needed to start a reaction?
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Describe the advantages of using catalysts.
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