Why is the reaction between calcium oxide and water that forms calcium hydroxide called a combination reaction?
Answer and explanation
Correct answer: Two reactants combine to form one product
In the reaction
\(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\), two reactants, calcium oxide and water, combine to form the single product calcium hydroxide. A reaction in which two or more reactants form one product is called a combination reaction. In contrast, option B describes a decomposition reaction, in which one substance breaks down into multiple products.
Frequently asked questions
What is the correct answer to this question?
Two reactants combine to form one product
Why is this the correct answer?
In the reaction
\(\mathrm{CaO + H_2O \rightarrow Ca(OH)_2}\), two reactants, calcium oxide and water, combine to form the single product calcium hydroxide. A reaction in which two or more reactants form one product is called a combination reaction. In contrast, option B describes a decomposition reaction, in which one substance breaks down into multiple products.
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.
