Which statement best describes a decomposition reaction?
Answer and explanation
Correct answer: One compound breaks down to form two or more simpler substances
In a decomposition reaction, one compound breaks down into two or more simpler substances. Its general form is \(AB \rightarrow A + B\). For example, on heating, calcium carbonate decomposes: \(\mathrm{CaCO_3 \rightarrow CaO + CO_2}\). In contrast, option A describes a combination reaction, in which substances join to form a product.
Frequently asked questions
What is the correct answer to this question?
One compound breaks down to form two or more simpler substances
Why is this the correct answer?
In a decomposition reaction, one compound breaks down into two or more simpler substances. Its general form is \(AB \rightarrow A + B\). For example, on heating, calcium carbonate decomposes: \(\mathrm{CaCO_3 \rightarrow CaO + CO_2}\). In contrast, option A describes a combination reaction, in which substances join to form a product.
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.
