Which is a correct example of a decomposition reaction caused by heating?
Answer and explanation
Correct answer: \(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\)
When calcium carbonate is heated, it breaks down into calcium oxide and carbon dioxide: \(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\). The breakdown of a compound into two or more simpler substances by heat is called thermal decomposition. In contrast, freezing water is only a change of state and does not form a new substance.
Frequently asked questions
What is the correct answer to this question?
\(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\)
Why is this the correct answer?
When calcium carbonate is heated, it breaks down into calcium oxide and carbon dioxide: \(\mathrm{CaCO_3 \xrightarrow{\Delta} CaO + CO_2}\). The breakdown of a compound into two or more simpler substances by heat is called thermal decomposition. In contrast, freezing water is only a change of state and does not form 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.
