Question

Mg→MgCl2→Mg(NO3)2→Mg(OH)2→MgO

Answer 1

Mg+2HCl=MgCl2+H2
MgCl2++HNO3=Mg(NO3)2+2HCl
Mg(NO3)2+2NaOH= Mg(OH)+2NaCl
Mg(OH)2>MgO+H2O