JEE MAIN - Chemistry (2005 - No. 57)

Which of the following oxides is amphoteric in character?
CaO
CO2
SiO2
SnO2

Explanation

These elements are called amphoteric which reacts with both acid and base.

Following elements are amphoteric

$$\left( 1 \right)\,\,\,\,Zn$$

$$\left( 2 \right)\,\,\,\,Be$$

$$\left( 3 \right)\,\,\,\,Al$$

$$\left( 4 \right)\,\,\,\,B$$

$$\left( 5 \right)\,\,\,\,Cr$$

$$\left( 6 \right)\,\,\,\,Ga$$

$$\left( 7 \right)\,\,\,\,Pb$$

$$\left( 8 \right)\,\,\,\,Sn$$

Here $$Zn,Be,Al,Pb\,\,\,$$ and $$\,$$ $$Sn$$ are mostly amphoteric.

$$B, Cr$$ and $$Ga$$ are less amphoteric.

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