Ncert Exercises & Solutions

Which of the following is amphoteric oxide ?

$1 . V_{2} O_{5}, C r_{2} O_{3}$
$2 . M n_{2} O_{7}, C r O_{3}$
$3 . C r O, V_{2} O_{5}$
$4 . V_{2} O_{5}, V_{2} O_{4}$

NEETprep Answer:

V_{2} O_{5} a n d C r_{2} O_{3}

are amphoteric oxide because both react with alkalies as well as acids.

Note In lower oxides, the basic characteris predominant while in higher oxides, the acidic character is predominant.