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Questions and Answers
What is the role of a catalyst in a chemical reaction?
What is the role of a catalyst in a chemical reaction?
- Slows down the reaction
- Initiates the reaction
- Remains unchanged at the end of the reaction (correct)
- Increases the yield of products
In a chemical equation, what does the coefficient represent?
In a chemical equation, what does the coefficient represent?
- State of matter of each substance
- Temperature at which the reaction occurs
- Identity of the compound
- Number of atoms of each element (correct)
Which of the following is an example of a chemical reaction?
Which of the following is an example of a chemical reaction?
- Breaking a glass
- Burning of wood (correct)
- Melting of ice
- Mixing of salt in water
Study Notes
Chemical Reactions
- A catalyst is a substance that speeds up a chemical reaction without being consumed or altered in the process.
- In a chemical equation, the coefficient represents the number of molecules or atoms of a reactant or product involved in the reaction.
Examples of Chemical Reactions
- A burning match, rusting of iron, and baking of bread are all examples of chemical reactions.
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Description
Test your knowledge of chemical reactions with this quiz designed for students in grade 8. Explore examples of chemical reactions, the role of catalysts, and the significance of coefficients in chemical equations.
