Match the following:-

	Column I	Column II
	(Elements)	(Symbol)
(i)	Acidic Radicals	${\mathrm{K}}^{+}, {\mathrm{Na}}^{+}$
(ii)	Basic Radicals	${\mathrm{Fe}}^{2+},{\mathrm{Fe}}^{3+}$
(iii)	Monovalent Radicals	${{\mathrm{CO}}_3}^{2-} , {{\mathrm{SO}}_4}^{2-}$
(iv)	Variable Valency	${\mathrm{Cl}}^{-}, {\mathrm{K}}^{+}$
(v)	Tetravalent elements	${\mathrm{Pb}}^{4+}, {\mathrm{Pt}}^{4+}$

 

Balance the Chemical Equation ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+\mathrm{HCl}\to {\mathrm{CrCl}}_3+{\mathrm{Cl}}_2+\mathrm{KCl}+{\mathrm{H}}_2\mathrm{O}$

Balance the chemical equation $({\mathrm{NH}}_4{)}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\to {\mathrm{N}}_2+{\mathrm{Cr}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{O}$

Balance the Chemical Equation $\mathrm{Mg}({\mathrm{NO}}_3{)}_2\to {\mathrm{NO}}_2+\mathrm{MgO}+{\mathrm{O}}_2$

Balance the Chemical Equation $\mathrm{Hg}({\mathrm{NO}}_3{)}_2\to \mathrm{Hg}+{\mathrm{NO}}_2+{\mathrm{O}}_2$

Balance the chemical equation ${\mathrm{Na}}_2{\mathrm{S}}_2{\mathrm{O}}_3+\mathrm{HCl}\to {\mathrm{H}}_2\mathrm{O}+\mathrm{NaCl}+{\mathrm{SO}}_2+\mathrm{S}$ 

Balance the chemical  equation ${\mathrm{CaOCl}}_2+{\mathrm{NH}}_3\to {\mathrm{H}}_2\mathrm{O}+{\mathrm{N}}_2+{\mathrm{CaCl}}_2$

balance the chemical equation:-

$\mathrm{Al}+{\mathrm{Fe}}_2{\mathrm{O}}_3\to \mathrm{Fe}+{\mathrm{Al}}_2{\mathrm{O}}_3$

 Balance the chemical equation:-

${\mathrm{NH}}_3+{\mathrm{O}}_2\to {\mathrm{H}}_2\mathrm{O}+{\mathrm{N}}_2$