The P Block Elements - Result Question 47
####48. Which of the following is the most basic oxide?
(a) $Sb_2 O_3$
(c) $SeO_2$
(b) $Bi_2 O_3$
(d) $Al_2 O_3$
[2006]
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Solution:
- (b) More the oxidation state of the central atom (metal), more is its acidity. Hence, $SeO_2$ (O. S. of $Se=+4)$ is acidic. Further for a given O.S., the basic character of the oxides increases with the increasing size of the central atom. Thus $Al_2 O_3$ and $Sb_2 O_3$ are amphoteric and $Bi_2 O_3$ is basic.
