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Questions and Answers
What is the main characteristic of a chemical reaction?
What is the main characteristic of a chemical reaction?
- Evolution of gas
- Formation of similar substances
- Rearrangement of atoms (correct)
- Formation of a protective layer
Why is cleaning the magnesium ribbon with sandpaper important before burning in air?
Why is cleaning the magnesium ribbon with sandpaper important before burning in air?
- To remove the reactants
- To speed up the chemical reaction
- To prevent evolution of gas
- To remove the protective layer of magnesium carbonate (correct)
Which term refers to substances that take part in a chemical reaction?
Which term refers to substances that take part in a chemical reaction?
- Catalysts
- Products
- Inhibitors
- Reactants (correct)
What is produced as a result of a chemical reaction?
What is produced as a result of a chemical reaction?
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Which chemical reaction characteristic involves the evolution of hydrogen gas?
Which chemical reaction characteristic involves the evolution of hydrogen gas?
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What is the purpose of a chemical equation?
What is the purpose of a chemical equation?
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In a balanced chemical equation, what does the Law of Conservation of Mass dictate?
In a balanced chemical equation, what does the Law of Conservation of Mass dictate?
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What is a key characteristic of a Balanced Chemical Equation?
What is a key characteristic of a Balanced Chemical Equation?
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Which type of chemical equation follows the Law of Conservation of Mass?
Which type of chemical equation follows the Law of Conservation of Mass?
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Why are symbols used in chemical equations?
Why are symbols used in chemical equations?
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