Q. Which of the following is an amphoteric oxide?
A) $SO_{3}$
B) $MgO$
C) $Al_{2}O_{3}$
D) $P_{4}O_{10}$
Explanation
(c)
$Al_{2}O_{3}$ behaves as an amphoteric oxide.
$Al_{2}O_{3} + 6HCl\ \rightarrow 2AlCl_{3} + 3H_{2}O$
$Al_{2}O_{3} + 2NaOH\overset{\mathrm{\Delta}}{\rightarrow}2NaAlO_{2} + H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.