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  4. The option(s) with only amphoteric oxides is(are)

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Q. The option(s) with only amphoteric oxides is(are)

JEE AdvancedJEE Advanced 2017Classification of Elements and Periodicity in Properties

Solution:

Amphoteric oxides are
$ZnO , Al _{2} O _{3}, PbO , PbO _{2}, BeO , SnO , SnO _{2}, Cr _{2} O _{3}$
NO is a neutral oxide.
$CrO$ is a basic oxide.
$B _{2} O _{3}$ is an acidic oxide