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CBSE Class 10 Science: Chemical Reactions and Equations Quiz

13 Questions

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CBSE Class 10 Science: Chemical Reactions and Equations Quiz

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Questions and Answers

What occurs when one or more reactants are changed into one or more products?

Melting

Chemical change (correct)

Boiling

Physical change

In a chemical reaction, what happens to the constituent atoms of the reactants?

They remain unchanged

They are rearranged (correct)

They evaporate

They are destroyed

What are the products formed when copper sulphate reacts with iron?

Iron and copper sulphate

Ferrous sulphate and copper (correct)

Copper and iron sulphate

Copper sulphide and iron

What does science explain about chemical reactions?

How molecular interactions occur Signup and view all the answers

When do physical and chemical changes occur?

When a substance changes form Signup and view all the answers

What are the CBSE notes for Class 10 Science Chapter 1 known for?

Being comprehensive and detailed yet concise Signup and view all the answers

Which of the following is an example of a physical change?

Boiling of water Signup and view all the answers

What helps determine a chemical reaction?

Evolution of a gas Signup and view all the answers

In which type of chemical reaction do reactants transform into products by making or breaking bonds between different atoms?

Redox reaction Signup and view all the answers

What is a word equation in the context of chemical reactions?

A chemical reaction expressed in words rather than chemical formulas Signup and view all the answers

Which factor can help categorize chemical reactions?

Formation of a precipitate Signup and view all the answers

What occurs in an exothermic reaction?

Release of heat Signup and view all the answers

Which type of reaction involves the breakdown of a single compound into two or more simpler substances?

Decomposition reaction Signup and view all the answers