Question

Write different types of chemical reaction.

Answer 1

combination reaction: two element react each other to form a product

eg: H2 + O2 Gives H2O

Decomposition reaction: the compound is provided heat, electricity, and light to break down its composition to form different elements.

three types of decomposition reaction

photo decomposition

light decomposition

electrolysis

displacement reaction: when high reactive metal displaces low reactive metal from one of its compound to form a product.

double displacement reaction: when high reactive metal displaces less reactive metal from both compound to form a product.

presipitation reaction: any reaction in which an insoluble solid is formed the solution is called a presipitation reaction.

Answer 2

The major types of chemical reactions are:

1. Combination or Synthesis Reaction

A combination or synthesis reaction is one, where a new product is synthesized by combination of two or three reactants.

Example

Hydrogen + Oxygen → Water

${H}_{2} + {O}_{2} → {H}_{2}O$

2. Decomposition Reaction

Decomposition reaction is one, where one compound decomposes or breaks into two or more different products.

Example

Lead nitrate → Lead monoxide + Nitrogen dioxide + Oxygen

$Pb(NO3 )2 → PbO + NO2 + O2$

3. Displacement or Replacement Reaction

There are two types of displacement reaction.

Single displacement reaction.

When a cation or an anion is exchanged from a compound, this is called as single displacement reaction.

XY + Z → XZ + Y

Example

Zn + H2SO4 → ZnSO4 + H2

Double displacement reaction

The anions are exchanged between two compounds, or salts. Such reactions results in different combination of cations and anions, at the end.

XY + AZ → XZ + AY

Example

BaCl2 + Na2SO4 → BaSO4 + 2NaCl

4. Acid Base Reactions

An acid and a base combines to give salt and water. This reaction is called as a neutralization reaction or just acid-base reaction.

Example

HBr + KOH → H2O + KBr

5. Combustion Reaction

A reaction where mostly an organic compound burns in the presence of oxygen to yield mostly carbon dioxide, water, and other products, is also a type of combination reaction.

Example

C4H10 + O2 → CO2 + H2O