Question

How many types of chemical reactions exist?

Answer 1

There are six basic chemical reactions. All of the million possible reactions that take place are basically classified under one of each of the following.

SYNTHESIS
`A + B -> AB`
`N_2 + 3H_2 ->2NH_3`

DECOMPOSITION
`AB -> A + B`
`2KClO_3 -> 2KCl + 3O_2`

SINGLE DISPLACEMENT
`AB + C -> AC + B`
`2HCl + Mg -> MgCl_2 + H_2`

DOUBLE DISPLACEMENT
`AB + CD -> AD + CB`
`NaNO_3 + KCl -> NaCl + KNO_3`

NEUTRALIZATION
`HA + BOH -> BA + HOH`
Acid + Base `->` Salt + Water

COMBUSTION
`CH + O_2 -> CO_2 + H_2O`
HydroCarbon + Oxygen #->Carbon Dioxide + Water

I hope this was helpful.
SMARTERTEACHER