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Q.

H2O2 is used as bleaching reagent because on dissociation it gives oxygen H2O2⟶H2O+12O2If "Chachi 420" used H2O2 solution to bleach her hair & she required 2.24 L O2 gas at 1 atm and 273 K. She has a H2O2 solution labelled as '5.6V' then what volume of such solution must she required to bleach her hair ?

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a

200 mL

b

300 mL

c

400 mL

d

500 mL

answer is C.

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Detailed Solution

volume of oxygen liberated=vol.strengh×vol.of H2O2      2.24=5.6×V   ; volume of H2O2 =400ml
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