First slide

Equivalent weights

Question

‘V’ litres of 0.5 M KMnO₄ can completely oxidise 5 litres of 0.2 M sodium nitrite in acidic medium. The value of ‘V’ is

Moderate

A

0.4
B

0.8
C

1.6
D

2.4

Solution

V₁N₁(KMnO₄)=V₂N₂(NaNO₂) ;
V₁(n₁)M₁=V₂(n₂)M₂ ;
V(5)0.5=5(2)0.2 ;
V= 0.8 litres ;

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