Which statement gives the clearest identification of a chemical reaction?
Answer and explanation
Correct answer: New substances with different properties are formed
In a chemical reaction, atoms in the reactants rearrange to form new substances. The products have properties different from those of the reactants, so the formation of new substances is a clear sign of a chemical change. In contrast, a change of state or shape is usually a physical change because no new substance is formed.
Frequently asked questions
What is the correct answer to this question?
New substances with different properties are formed
Why is this the correct answer?
In a chemical reaction, atoms in the reactants rearrange to form new substances. The products have properties different from those of the reactants, so the formation of new substances is a clear sign of a chemical change. In contrast, a change of state or shape is usually a physical change because no new substance is formed.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
