Hydrogen And Its Compounds Question 240
Question: 3.4 g sample of $ H_2O_2 $ solution containing x% $ H_2O_2 $ by weight requires x mL of $ KMnO_4 $ solution for complete oxidation under acidic condition. The normality of $ KMnO_4 $ solution is
Options:
A) IN
B) 2N
C) 3N
D) 0.5N
Show Answer
Answer:
Correct Answer: B
Solution:
[b] 100 g of $ H_2O_2 $ sample solution contains = x g of $ H_2O_2 $ 3.4 g of $ H_2O_2 $ sample solution contains $ =\frac{x}{100}\times 3.4 $ Weight of $ H_2O_2=\frac{3.4x}{100} $ Eq. of $ H_2O_2=\frac{3.4x}{100}\times \frac{1}{17} $ mEq of $ H_2O_2 $
$ =\frac{3.4x}{100\times 17}\times 1000=\frac{34x}{17}=2x $
$ mEqofKMnO_4=x\times N $
$ x\times N=2x $
$ N=2 $
BETA
