Question

The strength of $$20$$ volume of $${H}_{2}{O}_{2}$$ is:

A
13.6g/litre
B
60.7g/litre
C
160g/litre
D
20.2g/litre

Solution

The correct option is A $$60.7g/litre$$$$2{ H }_{ 2 }{ O }_{ 2 }\longrightarrow 2{ H }_{ 2 }O+{ O }_{ 2 }\quad$$$$2\times 34=68\ gm$$                $$22.4L$$ at N.T.P$$22.4L$$ of $${O}_{2}$$ at NTP is produced from $$68\ gm\ {H}_{2}{O}_{2}$$.$$20L$$ of $${O}_{2}$$ at N.T.P is produced from $${H}_{2}{O}_{2}$$  $$\Rightarrow \cfrac { 68\times 20 }{ 22.4 } =60.7\quad$$$$\therefore$$ Strength of $${H}_{2}{O}_{2}$$ in $$20$$ volume  $${H}_{2}{O}_{2}=60.7g/L$$Hence, option B is correct.Chemistry

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