D-And F-Block Elements Ques 442
Question: $ KMnO_4 $ acts as an oxidizing agent in acidic medium. The number of moles of $ KMnO_4 $ needed to react with one mole of sulphide ions in acidic solution is
Options:
A) 2/5
B) 3/5
C) 1/5
D) 4/5
Show Answer
Answer:
Correct Answer: A
Solution:
$ 5{{S}^{2-}}+2MnO_4^{-}+16{{H}^{+}}\to 2M{{n}^{2+}}5S+8H_2O$
5 moles of sulphide ion require 2 moles of $ KMnO_4. $
Thus, 1 mole of sulphide ion requires $ \frac{2}{5} $ moles of $ KMnO_4 $ .
