List of top Chemistry Questions on Balancing a redox reaction asked in AP EAPCET

In the balanced equations, the values of \(a\), \(b\) and \(c\) are respectively
\[ aFe_3O_4(s)+bAl(s)\longrightarrow Fe(s)+Al_2O_3(s) \] \[ V_2O_5(s)+cCa(s)\longrightarrow V(s)+CaO(s) \]