Answer: General formula for acid is given by HX.
Step-by-step explanation: To write the general formula for an acid, we fix one atom which is hydrogen because this atom is common to all the acids.
General formula for acid is written by HX.
where H represents Hydrogen atom.
and X represents any monoatomic ion or polyatomic ions.
For example: The acid having formula
is in the general form where, X is
which is a polyatomic anion.