Q. Which of the following are correctly matched?

1. Combination reaction- formation of single product
2. Decomposition reaction- break down of single entity
3. Thermal decomposition- heat is used
4. Displacement reaction- based on reactivity series

Select the correct answer from the codes given below:
Answer: All of the above
Notes: A reaction in which a single product is formed from two or more reactants is known as a combination reaction. A large amount of heat is evolved. This makes the reaction mixture warm. Reactions in which heat is released along with the formation of products are called exothermic chemical reactions. When a single reactant breaks down to give simpler products, it is a decomposition reaction. When a decomposition reaction is carried out by heating, it is called thermal decomposition. In displacement reaction, the higher reactive metal displaces the less reactive metal.

This question is part of UPSC Daily 20 MCQ Series Course on GKToday Android app.