Question
What is meant by combination reaction? Explain it with a suitable example.
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Answer
- Chemical reaction in which two or more substances (reactants) undergo reaction to form a single product is called combination reaction.
- For example,
- $\mathrm{CaO}(\mathrm{s})+\mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{Ca}(\mathrm{OH})_2(\mathrm{aq})$
- Calcium Water Calcium
- oxide hydroxide
- (Lime stone, (Slaked lime,
- quick lime) lime water)
- In above reaction, two compounds $\mathrm{CaO}(\mathrm{s})$ and $\mathrm{H}_2 \mathrm{O}(\mathrm{l})$ undergo chemical reaction and form single product $\mathrm{Ca}(\mathrm{OH})_2(\mathrm{aq})$; along with evolution of heat.
- Thus, this reaction is a combination reaction.
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