10 " mL of " a solution of `H_(2)O_(2)` of 10 violume strength decolourises 100 " mL of " `KMnO_(4)` solution acidified with dil `H_(2)SO_(4)`. The amount of `KMnO_(4)` in the given solution is `K=39, Mn=55)`

Options

A. 0.282 g
B. 0.564 g
C. 1.128g
D. 0.155 g

Answer

B

Explanation

Volume of `O_(2)` at STP`=10mLxx10V=100mL`
`22400" mL of " O_(2) at STP =1 mol=4Eq`
`100 " mL of " O_(2) STP=(4)/(22400)xx100=(1)/(56)Eq`
" Eq of "`KMnO_(4)=" Eq of "O_(2)`
`=(1)/(56)" Eq of "KMnO_(4)`
`=(1)/(56)xx31.5g of KMnO_(4)`
`=0.564g`
`(Ew of KMnO_(4)` in acidic medium `=(Mw)/(5)=31.5`)