X = 40, Y = 30

X = 50, Y = 25

X = 60, Y = 20

Cannot be determined from the given data

$ZnO(s) + H2SO4(aq) → ZnSO4(aq) + H2O(l)$

$Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)$

$2Zn(s) + O2(g) → 2ZnO(s)$

$ZnCO3(s) → ZnO(s) + CO2(g)$

Above Zn

Below Cu

Between Zn and Cu

Above both Zn and Cu

$Fe + 2HCl o FeC{l_2} + {H_2} \uparrow$

$2Pb{(N{O_3})_2} o 2PbO + 4N{O_2} + {O_2} \uparrow$

$2KCl{O_3}\xrightarrow{\Delta }2KCl + 3{O_2}$

$C{r_2}{O_3} + 2Al\xrightarrow{\Delta }A{l_2}{O_3} + 2Cr$

$Fe + 2HCl o FeC{l_2} + {H_2} \uparrow$

$2Pb{(N{O_3})_2} o 2PbO + 4N{O_2} + {O_2} \uparrow$

$2KCl{O_3}\xrightarrow{\Delta }2KCl + 3{O_2}$

$C{r_2}{O_3} + 2Al\xrightarrow{\Delta }A{l_2}{O_3} + 2Cr$

Mg

Cu

Ag

Au