The P Block Elements - Result Question 47

####48. Which of the following is the most basic oxide?

(a) Sb2O3

(c) SeO2

(b) Bi2O3

(d) Al2O3

[2006]

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Solution:

  1. (b) More the oxidation state of the central atom (metal), more is its acidity. Hence, SeO2 (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 Al2O3 and Sb2O3 are amphoteric and Bi2O3 is basic.


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