Question

What are the different types of combination reactions? Give an example of each

Answer 1

Combination reaction: It is the type of reaction in which two or more compounds or elements are combined to form one new compound.

For example: Sodium(Na) combines with chlorine(Cl₂) to form sodium chloride(NaCl).

2Na(s) + Cl₂ (g)$\to$2NaCl(s)

There are mainly three types of combination reactions.

• Element-Element combination reaction
• Element-Compound combination reaction
• Compound-Compound Combination reaction

Element-Element combination reaction: It is the type of reaction in which an element combines with another element.

For example, Nitrogen(N₂) combines with hydrogen(H₂) to produce ammonia gas (NH₃)

N₃(g)+H₃(g)$\to$ NH₃(g)

Element-Compound combination reaction: It is the type of reaction in which an element combines with a compound.

For example, Sulphur dioxide(SO₂) is a compound combined with the element Oxygen(Oxygen exists as O₂) to give Sulphur trioxide(SO₃)

SO₂(g)+O₂(g) $\to$SO₃(g)

Compound-Compound Combination reaction: It is the type of reaction in which a compound combines with another compound.

For example, Calcium oxide (CaO) is a compound combined with water(H₂O) which is also a compound to give calcium hydroxide(Ca(OH)₂)

CaO(s)+H₂O(l)$\to$Ca(OH)₂(s)