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Question

Which of the following statements is/are correct about 6.8% strength of H2O2?

A
Its normality is 4 N
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B
Its molarity is 2 M
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C
Its volume strength is 22.4 V
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D
Volume strength =11.2×M
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Solution

The correct options are
A Its normality is 4 N
B Its molarity is 2 M
C Its volume strength is 22.4 V
D Volume strength =11.2×M
Given,
6.8 g in 100 mL solution
68 g in 1000 mL solution
Molarity of the solution= 6834 mol1 L=2 M
So normality will be =2×2=4 N

Again,
H2O2=H2O+12O2

We know, volume strength refers to the volume of oxygen gas liberated from 1 volume of H2O2.
Since 1 mol of H2O2 gives 12 mol of O2
Thus volume strength =22.42×M=11.2×M

So here volume strength of the solution is 11.2×2=22.4 V




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