Question

Define combination reaction and give 1 example of it which is exothermic

Answer 1

HELL... OOO...!!

In combination reactions, two or more substances combine to form a new compound. Only one product is obtained in such reactions. The reactants in such reactions can be elements as well as compounds. The general equation used to represent a combination reaction is:

A + Z AZ

For example, calcium oxide reacts vigorously with water to produce calcium hydroxide.

CaO + H2O --- Ca(OH)2 + H2O

A large amount of heat is also evolved during this process, which increases the temperature of the system. Hence, the combination of calcium oxide and water is exothermic in nature.

Answer 2

Answer:

Combination Reaction :-

A reaction in which two or more substances combine together to form a new substances, is called a combination reaction.  The following reactions are combination reaction :-

Sulphur dioxide and oxygen combine to form sulphur trioxide.

                SO₂(g) + O₂(g)  ==>  SO₃(g)