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JEE Main 202127 AugustEvening Shift

Exam: JEE Main
Year: 2021
Date: 27 August
Shift: Evening Shift
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2021 · 27 August · Evening Shift · Chemistry · s Block Elements

The oxide that gives H _ 2 O _ 2 most readily on treatment with H _...

The oxide that gives

{H}_{2}{O}_{2}

most readily on treatment with

{H}_{2}O

is :

Options

A ${Na}_{2}{O}_{2}$
B ${BaO}_{2} . 8{H}_{2}O$
C ${SnO}_{2}$
D ${PbO}_{2}$

Correct answer

A. ${Na}_{2}{O}_{2}$

Step-by-step solution

Among the given compounds ${Na}_{2}{O}_{2}\text{and}{BaO}_{2} . 8{H}_{2}O$ are the peroxides. ${SnO}_{2}\text{and}{PbO}_{2}$ are the oxides.

${Na}_{2}{O}_{2} + {H}_{2}O \to NaOH + {H}_{2}{O}_{2}$

Acidified barium peroxide gives hydrogen peroxide.

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