Solution

$$\text{Strong acid means those acids which give a very high}$$ $$ H^+ $$
$$\text{ion concentration upon dilution or those which are able to generate a greater volume of}$$ $$ H^+ $$ $$\text{ions per unit quantity whereas concentrated acid means how many moles of the acid is present in a}$$ $$\text{given quantity of a solvent. Higher concentration means a greater amount of the acid per unit of the solvent. }$$