Which of the following is an amphoteric oxide? (a) \( \mathrm{SnO} \) (b) \( \mathrm{V}_{2} \mat...

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Which of the following is an amphoteric oxide?
(a) \( \mathrm{SnO} \)
(b) \( \mathrm{V}_{2} \mathrm{O}_{5} \)
(c) \( \mathrm{Cr}_{2} \mathrm{O}_{3} \)
(d) All of these
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