InterviewSolution
Saved Bookmarks
| 1. |
`x` gram of pure `As_(2)S_(3)` is completely oxididsed to respective highest oxidation states by 50 ml of 0.1 M hot acidified `KMnO_(4)`, then mass of `As_(2)S_(3)` taken is :A. 22.4 gB. 43.92 gC. 64.23 gD. None of these |
|
Answer» Correct Answer - D `5As_(2)S_(3)+28KMnO_(4)+H^(+)rarr10H_(3)AsO_(4)+28Mn^(2+)+SO_(4)^(2-)` m.moles of `KMnO_(4)=50xx0.1=5` 28 m.moles of `KMnO_(4)rarr5` m.moles of `As_(2)S_(3)` `:. ` 1 m.mole of `KMnO_(4)rarr` 5/28 m.moles of `As_(2)S_(3)` `:. ` 5 m.mole of `KMnO_(4)rarr(5xx5)/(28)` m.moles of `As_(2)S_(3)` Mass of `As_(2)S_(3)=x=246xx(5xx5)/(28)xx10^(-3)=0.2.2g` |
|