Which of the following oxides is amphoteric in character?

Which of the following oxides is amphoteric in character?
  1. $\mathrm{CaO}$
  2. $\mathrm{CO}_2$
  3. $\mathrm{SiO}_2$
  4. $\mathrm{SnO}_2$

Solution

$\mathrm{CaO} \longrightarrow$ basic $\mathrm{SiO}_2 \& \mathrm{CO}_2 \longrightarrow$ acidic $\mathrm{SnO}_2 \longrightarrow$ amphoteric

Asked in: JEE Main 2005

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