Mineral acids are stronger acids than carboxylic acids because

(i) mineral acids are completely ionised

(ii) carboxylic acids are completely ionised

(iii) mineral acids are partially ionised

(iv) carboxylic acids are partially ionised

Acids ionize in a solution. Strength of an acid is determined by the ability to furnish H⁺ions in a solution. A strong acid such as mineral acids dissociate completely to furnish H⁺ions whereas weaker acids such as carboxylic acids do not dissociate completely to furnish H⁺ions. Hence, mineral acids are more acidic than carboxylic acids.