Explain five different types of chemical reaction with one suitable example for each.
Answers
1) A combination reaction, also known as a synthesis reaction, is a reaction in which two or more substances combine to form a single new substance.
Example: A+B => AB
2) A decomposition reaction is a reaction in which a compound breaks down into two or more simpler substances.
Example: AB => A+B
3) A single-replacement reaction is a reaction in which one element replaces a similar element in a compound.
Example: A+BC => AC+B
4) A double-replacement reaction is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds.
Example: AB+CD => AD+CB
5) A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant.
Example: C3H8(g)+5O2(g) => 3CO2(g)+4H2O(g)