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JEE Main 202325 JanuaryMorning Shift

Exam: JEE Main
Year: 2023
Date: 25 January
Shift: Morning Shift
Subject: Chemistry
Chapter: Hydrogen

JEE Main 2023 · 25 January · Morning Shift · Chemistry · Hydrogen

' 25 volume' hydrogen peroxide means

'

25

volume' hydrogen peroxide means

Options

A $1L$ marketed solution contains $250g$ of ${H}_{2}{O}_{2}$ .
B $1L$ marketed solution contains $75g$ of ${H}_{2}{O}_{2}$ .
C $100mL$ marketed solution contains $25g$ of ${H}_{2}{O}_{2}$ .
D $1L$ marketed solution contains $25g$ of ${H}_{2}{O}_{2}$ .

Correct answer

B. $1L$ marketed solution contains $75g$ of ${H}_{2}{O}_{2}$ .

Step-by-step solution

$25$ volumes' ${H}_{2}{O}_{2}$ means: $1L$ of ${H}_{2}{O}_{2}$ on decomposition give $25L$ of ${O}_{2}$ (g) at $STP$ .

$2{H}_{2}{O}_{2} ( l ) \to 2{H}_{2}O ( l ) + {O}_{2} ( g ) 2 [ \dfrac{25}{22 . 4} ] mole [ \dfrac{25}{22 . 4} ] mole$

Mass of ${H}_{2}{O}_{2}=\dfrac{2 \times 25}{22 . 4} \times 34 = 75\text{gram}$

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