JEE MAIN - Chemistry (2003 - No. 61)
Which one of the following is an amphoteric oxide?
Na2O
SO2
B2O3
ZnO
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.
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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