The option(s) with only amphotericoxides is(are) ?

1.	The option(s) with only amphotericoxides is(are) ?
Answer» `CrO_(3),BeO,SnO,SnO_(2)` `ZnO,Al_(2)O_(3),PbO,PbO_(2)` `NO,B_(2)O_(3),PbO,SnO_(2)` `Cr_(2)O_(3),CRO,SnO,PbO` Solution :NO is NEUTRAL `CrO` is basicwhile `B_(2)O_(3)`is acidic. Therefore,all the oxidesincludedin options (a) and (b) are amphotericnature.

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