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13/12/2021 4:15 pm
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20 volume H2O2 solution has a strength of about
(a) 30%
(b) 6%
(c) 3%
(d) 10%
1 Answer
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13/12/2021 4:21 pm
Correct answer: (b) 6%
Explanation:
∵ 22.4 litre O2 at N.T.P. obtained by 68 gm of H2O2
∴ 1 litre O2 at N.T.P. obtained by \(\frac{68}{22.4}\)gm of H2O2
∴ 20 litre O2 at N.T.P. obtained by
\(\frac{68}{22.4}\) x 20 gm of H2O2
= 60.71 gm of H2O2
∴ 1000 ml O2 at N.T.P. obtained by
= 60.71 gm of H2O2
∴ 100 ml O2 at N.T.P. obtained by
= \(\frac{60.71}{1000} \times 100\) = 6.071%