Question

Mg→MgBr2→MgCl2→Mg(NO3)2→Mg(OH)2→MgO→MgCl2

Answer 1

Mg+Br2=MgBr2

MgBr2+ 2HCL=MgCl2+2HBr

MgCL2+Zn(NO3)2=Mg(NO3)2+ZnCl2

Mg(NO3)2+2NaOH=Mg(OH)2+2NaNO3

Mg(OH)2=MgO+H2O

MgO+2HCl=MgCL2+H2O