1.3Zn+. 2H3PO4= Zn3(PO4)2+6H2
2.Mg+ 2HCl = MgCl2 + H2
3.Ca+H2SO4=CaSO4+H2
4.2Al+2H3PO4=2AlPO4+3H2
5.2Fe+2H3PO4=2FePO4+3H2
6.6Al+2HCl=2Al3Cl+H2
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Answers & Comments
1.3Zn+. 2H3PO4= Zn3(PO4)2+6H2
2.Mg+ 2HCl = MgCl2 + H2
3.Ca+H2SO4=CaSO4+H2
4.2Al+2H3PO4=2AlPO4+3H2
5.2Fe+2H3PO4=2FePO4+3H2
6.6Al+2HCl=2Al3Cl+H2