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Consider the oxides of group 14 elements SiO 2 , GeO 2 SnO 2 , PbO 2 , CO and GeO. The amphoteric oxides are

1. SnO 2 , CO
2. SiO 2 , GeO 2
3. GeO, GeO 2
4. SnO 2 , PbO 2

Correct answer: SnO 2 , PbO 2

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