Browse Questions

# Which one is most ionic?

$(A)\;P_2O_5 \\ (B)\;CrO_3 \\(C)\;MNO \\(D)\;Mn_2O_7$

$P_2O_5$ is a non- metallic oxide and so it must be more covalent than others which are metallic oxides.
More over the metallic oxide with metal in higher oxidation state is more covalent so $Mn_2O_7(Mn=+7\;state)$ is most covalent and $MnO(Mn=+2\;state)$ is most ionic amongst $Mn_2O_7$.
$MnO$ and $CrO_3(Cr=+6\;state)$
Hence C is the correct answer.