D And F Block Elements Question 337
Which of the following statements is correct about equivalent weight of $ KMnO_4 $ in acidic medium
[MP PET 1994]
Options:
A) It has one third of its molecular weight in alkaline medium
B) It has a molecular weight that is one fifth in an alkaline medium
C) It is equal to its molecular weight in an acidic medium
D) It is one third of its molecular weight in an acidic medium
Show Answer
Answer:
Correct Answer: A
Solution:
It is one third of its molecular weight in alkaline medium because it releases 3 nascent oxygen atoms in alkaline medium.
$ 2KMnO_4+H_2O,\xrightarrow{+3{{e}^{-}}},2KOH+2MnO_2+3[O] $ \ Equivalent weight = $ \frac{M}{5} $
BETA
