Balance the following equation by Hit and trial method :

${\mathrm{CuSO}}_4 + {\mathrm{PH}}_3 \to {\mathrm{Cu}}_3{\mathrm{P}}_2 + {\mathrm{H}}_2{\mathrm{SO}}_4$

Balance the following equation by Hit and trial method :

${\mathrm{KMnO}}_4 \to {\mathrm{K}}_2{\mathrm{MnO}}_4 + {\mathrm{MnO}}_2 + {\mathrm{O}}_2$

Balance the following equation by Hit and trial method :

$\mathrm{NaOH} + {\mathrm{F}}_2 \to \mathrm{NaF} + {\mathrm{H}}_2\mathrm{O} + {\mathrm{O}}_2$

Balance the following equation by Hit and trial method :

$\mathrm{Cu} + {\mathrm{HNO}}_3 \to \mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2 + {\mathrm{H}}_2\mathrm{O} + \mathrm{NO}$

Balance the following equation by Hit and trial method :

$\mathrm{Al} + {\mathrm{Fe}}_3{\mathrm{O}}_4 \to {\mathrm{Al}}_2{\mathrm{O}}_3 + \mathrm{Fe}$

Balance the following equation by Hit and trial method :

$\mathrm{NaCl} + {\mathrm{H}}_2{\mathrm{SO}}_4 \to {\mathrm{Na}}_2{\mathrm{SO}}_4 + \mathrm{HCl}$