The Total solution for NCERT class 6-12
(a) Zn (s) + H2SO (aq) = ZnSO4 (aq) +H2 (g)
(b) Mg (s) + 2HCI (aq) = MgCl2 (aq) + H2 (g)
(c) 2Al (s) + 3H2SO4 (aq) = Al2(SO4)3 (aq)+ H2 (g)
(d) Fe(s) + 2HCI (aq) = FeCl2 (aq) + H2 (g)