[MP PET 1990]
A) $ P_2O_3 $
B) $ Bi_2O_3 $
C) $ As_2O_3 $
D) $ B_2O_3 $
Correct Answer: B
$ \underbrace{P_2O_3A_2O_3B_2O_3} _{Acidicoxides} $ $ \underbrace{Bi_2O_3} _{Alkaline} $
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