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Questions and Answers
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Mixing of salt and water
- Melting of ice
- Burning of wood (correct)
- Boiling of water
Which of the following is a characteristic of chemical reactions?
Which of the following is a characteristic of chemical reactions?
- They can only occur at high temperatures
- They involve the formation or breaking of chemical bonds (correct)
- They can only occur in living organisms
- They can only occur in a laboratory setting
What is the purpose of a catalyst in a chemical reaction?
What is the purpose of a catalyst in a chemical reaction?
- To increase the temperature of the reaction
- To slow down the reaction
- To provide energy for the reaction
- To speed up the reaction (correct)
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
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What happens to the mass of substances during a chemical reaction?
What happens to the mass of substances during a chemical reaction?
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What is the role of a catalyst in a chemical reaction?
What is the role of a catalyst in a chemical reaction?
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