In the following reactions, the total number of oxygen atoms in X and Y is ____ $\mathrm{Na}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{X}$ $\mathrm{Cl}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{Y}$

JEE Main · 2023 · 10 Apr 2023 · Shift 1 · p-Block Elements

In the following reactions, the total number of oxygen atoms in X and Y is ____

Na_{2} O + H_{2} O \to 2 X

Cl_{2} O_{7} + H_{2} O \to 2 Y

Answer: 5

Solution

Sodium oxide is a basic oxide and reacts with water to give sodium hydroxide, so the two moles of product X are sodium hydroxide, each formula unit of which contains one oxygen atom. Dichlorine heptoxide is the anhydride of perchloric acid and reacts with water to give perchloric acid, so the two moles of product Y are perchloric acid, each formula unit carrying four oxygen atoms. Counting one oxygen in X and four in Y, the total number of oxygen atoms in X and Y is five.

JEE Main · 2023 · 10 Apr 2023 · Shift 1 · Integer answer

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