How many mililiters of 20 volume of H2O2...

How many mililiters of 20 volume of `H_2O_2` solution is needed to react completely with 500mL of acidified 1N `KMnO_4` solution?

140

224

280

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The correct Answer is:

Answer(2) Normality of `H_2O_2[N_2] = ("volume if" O_2 at NTP)/("Equivalent mass")`
= 20/5.6 = 3.57 gt N` = Volume `of H_2O_2[V_2] = N_1V_1 = N_2V_21(500) = 3.57(V_2)` = V_2 = 500/3.57therefore V_2 = 140ml`

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