What are instantaneous reactions ? Give an example.

Explanation

The chemical reactions which complete immediately on mixing the reactants are called instantaneous reactions. For example, when `AgNO_(3),` and NaCl solutions are mixed, white precipitates of AgCl are formed immediately.
`Ag ^(+) (aq)+ NO _(3) ^(-) (aq)+ Na ^(+) (aq) + Cl ^(-) (aq) to Ag Cl (s) + Na ^(+) (aq) + NO _(3) ^(-) (aq)`