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Chemical Reactions Class 10 Quiz

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Questions and Answers

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?

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?

Catalysts

Products

Inhibitors

Reactants (correct)

What is produced as a result of a chemical reaction?

Product Signup and view all the answers

Which chemical reaction characteristic involves the evolution of hydrogen gas?

Evolution of gas Signup and view all the answers

What is the purpose of a chemical equation?

To represent a chemical reaction in a concise and informative way Signup and view all the answers

In a balanced chemical equation, what does the Law of Conservation of Mass dictate?

Mass remains constant before and after the reaction Signup and view all the answers

What is a key characteristic of a Balanced Chemical Equation?

Number of atoms of each element is equal on both sides Signup and view all the answers

Which type of chemical equation follows the Law of Conservation of Mass?

Balanced Chemical Equation Signup and view all the answers

Why are symbols used in chemical equations?

To simplify and represent chemical reactions concisely Signup and view all the answers