Periodic Classification And Periodic Properties Ques 21
21. The option(s) with only amphoteric oxides is(are)(2017 Adv.)
(a) $\mathrm{NO}, \mathrm{B} _{2} \mathrm{O} _{3}, \mathrm{PbO}, \mathrm{SnO} _{2}$
(b) $\mathrm{Cr} _{2} \mathrm{O} _{3}, \mathrm{CrO}, \mathrm{SnO}, \mathrm{PbO}$
(c) $\mathrm{Cr} _{2} \mathrm{O} _{3}, \mathrm{BeO}, \mathrm{SnO}, \mathrm{SnO} _{2}$
(d) $\mathrm{ZnO}, \mathrm{Al} _{2} \mathrm{O} _{3}, \mathrm{PbO}, \mathrm{PbO} _{2}$
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Answer:
Correct Answer: 21.(c)
Solution:
- (c) is incorrect because NO is neutral oxide.
(d) is incorrect because $\mathrm{CrO}$ is basic oxide.
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