Question

Most acidic oxide among the following is –
(a) N₂O5 (b) P₂O₅ (c) N₂O₄ (d) As₂O₃

Answer 1

Among the given oxides, the most acidic oxide is (a) $N_2O_5$.

Explanation:

• To find most acidic oxide form the given compounds, its reaction with water must be examined.
• It is because, the stronger the acid obtained through dissociation, the stronger is the acidic oxide.
• Accordingly, the reaction of given oxides with water is as follows:

(a) $N_2O_5+H_2O\rightarrow 2HNO_3$

(b) $P_2O_5+3H_2O\rightarrow2H_3PO_4$

(c) $N_2O_4+H_2O\rightarrow HNO_3+HNO_2$

(d) $As_2O_3+3H_2O\rightarrow 2H_3AsO_3$

• Among the acids produced by given acids, nitric acid $(HNO_3)$ is the strongest one.
• As nitric acid is produced by $N_2O_5$, it is considered as the most acidic oxide among the given oxides.

Learn more about such concept

Which of the following elements would form acidic oxides? a carbon, b magnesium, c sulphur, d zinc, e iron

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Answer 2

AMONG THE GIVEN OXIDES THE MOST ACIDIC OXIDE IS N₂O₅

• Thus , option (a) N₂O₅ is correct answer