Question

Which one among the following is an acidic oxide?

1 point

(a) Na2O

(b) CO

(c) CO2

(d) Al2O3

​

Answer 1

Answer:

c) co²

Acidic oxides, or acid anhydride, are oxides that react with water to form an acid, or with a base to form a salt. They are oxides of either nonmetals or of metals in high oxidation states.For example, sulfurous acid (SO2), sulfuric acid (SO3), and carbonic acid (CO2) are acidic oxides.

Answer 2

(c) $CO_{2}$ is an acidic oxide.

Explanation:

An acidic oxide reacts with water and produces acid. Usually, it is the oxide of non-metals.

 $CO_{2}$ +$H_{2}O$→ $H_{2} CO_{3}$  

• Carbon dioxide reacts with water to give carbonic acid.

• Non-metals react with oxygen to form acidic compounds of oxides which are held together by covalent bonds.

• These compounds can also be called as acid anhydrides.

• Acid anhydrides usually have a low melting and boiling point.

• $Al_{2}O_{3}$ is an amphoteric oxide.

• $CO$ is a neutral oxide.

• $Na_{2} O$ is a basic oxide.