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Q.

There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength.

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answer is 4.

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Detailed Solution

H2O2 → H2O + 12 O2 ×2 2H2O268 g → H2O +O2  22.4 litres at N.T.P. ∵  22.4 litres O2 at N.T.P. obtained by 68 g of H2O2 ∴  10 litres O2 at N.T.P. obtained by 6822.4 × 10 = 30.35 g /litre ∴  1000 ml O2 at N.T.P. obtained by =30.35 g ∴  100 ml O2 at N.T.P. obtained by 30.351000 × 100=3.035%
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