25 ml of H_(2)O_(2) solution was added to excess of acidified Kl solution. The iodine so liberated required 20 ml. of 1 N sodium thiosulphate solution. What is volume strength ofH_(2)O_(2)

25 ml of H_(2)O_(2) solution was added to excess of acidified Kl solut

1.	25 ml of H_(2)O_(2) solution was added to excess of acidified Kl solution. The iodine so liberated required 20 ml. of 1 N sodium thiosulphate solution. What is volume strength ofH_(2)O_(2)
Answer» 0.224 0.112 0.056 0.448 Solution :20 ML 0.1 N `Na_2S_2O_3 = 20mL 0.1 NI_2` ` = 20 mL 0.1 NH_2O_2` Normality of ADDED `H_2O_2 = (20 xx 0.1)/25 = 0.08` vol. strength`= 5.6 xx 0.08 = 0.448`