Which of the following is a chemical change?
Answer and explanation
Correct answer: Rusting of iron
A chemical change produces one or more new substances with different properties. During rusting, iron reacts with oxygen and moisture to form iron oxides, commonly represented as hydrated iron(III) oxide, so the original iron is chemically changed. Melting ice changes only the physical state, dissolving sugar usually allows recovery by evaporation, and tearing paper changes size and shape without forming a new substance.
Frequently asked questions
What is the correct answer to this question?
Rusting of iron
Why is this the correct answer?
A chemical change produces one or more new substances with different properties. During rusting, iron reacts with oxygen and moisture to form iron oxides, commonly represented as hydrated iron(III) oxide, so the original iron is chemically changed. Melting ice changes only the physical state, dissolving sugar usually allows recovery by evaporation, and tearing paper changes size and shape without forming a new substance.
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.
