JEE Advanced · 2017 · 21 May 2017 · Paper 2 · Classification of Elements and Periodicity

The option(s) with only amphoteric oxides is(are)

Answer: (A), (D)

Solution

Amphoteric oxides react with both acids and bases. Common amphoteric oxides include:

ZnO, Al_{2} O_{3}, PbO, PbO_{2}, BeO, SnO, SnO_{2}, Cr_{2} O_{3}

.

[A] Correct: All four oxides listed are amphoteric.

[B] Incorrect:

CrO

is a basic oxide, not amphoteric.

[C] Incorrect:

NO

is a neutral oxide and

B_{2} O_{3}

is an acidic oxide.

[D] Correct: All four oxides listed are amphoteric.

JEE Advanced · 2017 · 21 May 2017 · Paper 2 · One or more correct options