How does melting of ice differ from electrolysis of water?
Answer and explanation
Correct answer: No new substance is formed when ice melts, whereas electrolysis of water forms new substances.
Melting of ice is a physical change because ice changes only into liquid water and no new substance is formed. In contrast, electrolysis of water uses electrical energy to produce hydrogen and oxygen gases from water. The formation of new substances shows that electrolysis is a chemical change. Therefore, option B is incorrect because electrolysis is not merely a change of state.
Frequently asked questions
What is the correct answer to this question?
No new substance is formed when ice melts, whereas electrolysis of water forms new substances.
Why is this the correct answer?
Melting of ice is a physical change because ice changes only into liquid water and no new substance is formed. In contrast, electrolysis of water uses electrical energy to produce hydrogen and oxygen gases from water. The formation of new substances shows that electrolysis is a chemical change. Therefore, option B is incorrect because electrolysis is not merely a change of state.
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.
