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Q.
Among $P_2O_5, As_2O_3, Sb_2O_3$ and $Bi_2O_3$, the most acidic oxide is
KVPYKVPY 2017
Solution:
$P _{2} O _{5}, As _{2} O _{3}$ are acidic oxides, $Sb _{2} O _{3}$ is an amphoteric while $Bi _{2} O _{3}$ is basic oxide but $P _{2} O _{5}$ is most acidic among them all. This is because down the group, metallic character increases and metal oxides are more basic, thus the basicity of metallic oxides also increases.