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# A few drops of conc $H_2SO_4$ is added to the solution of $FeSO_4$ in water to

(a) convert $Fe{3+}$ ions $Fe^{2+}$ ions
(b) Prevent salt hydrolysis
(c) Prevent salt hydrolysis and convert $Fe{3+}$ ions $Fe^{2+}$ ions
(d) none of these

A few drops of conc. $H_SO_4$ added to a solution of $FeSO_4$ [or $Al_2(SO_4)_3$] - a salt of strong acid, and weak base, prevents salt hydrolysis and thus helps in getting a clear solution.