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