JEE Main · 2022 · 28 Jun 2022 · Shift 2 · s-Block Elements

Among the following basic oxide is :

(A) $SO_{3}$
(B) $SiO_{2}$
(C)CaO✓ Correct
(D) $Al_{2} O_{3}$

Answer: (C)

Solution

Classify each oxide:

SO_{3}

and

SiO_{2}

are acidic oxides (non-metal oxides).

Al_{2} O_{3}

is amphoteric (reacts with both acids and bases). CaO is a basic oxide (metal oxide of an alkaline earth metal that reacts with acids to form salts and water). Therefore, CaO is the basic oxide.

JEE Main · 2022 · 28 Jun 2022 · Shift 2 · Single correct option

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