First slide

Equivalent weights

Question

‘V’ litres of 2.5 M KMnO₄ can completely oxidise 2 litres of 2.5 M potassium iodide in acidic medium. The value of ‘V’ is

Moderate

A

0.4
B

0.5
C

0.1
D

0.2

Solution

V₁N₁(KMnO₄)=V₂N₂(KI) ;
V₁(n₁)M₁=V₂(n₂)M₂ ;
V(5)2.5=2(1)2.5 ;
V= 0.4 litres ;

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