The volume strength of H₂O₂ solution if 50ml of H₂O₂ solution is diluted with 50ml of H₂O. 20ml.
of this diluted solution required 40mL of M/60 K₂Cr₂O₇ solution in presence of H₂SO₄ for complete
volume is ———

m eq of H₂O₂ = m eq of K₂Cr₂O₇ 
M. nf. V = M. nf. V 
N V = N V ; N × 20 = 1/6 × 6 ; N = 0.2 N 
The normality of 50ml of H₂O₂ solution is twice than 20ml of solution since it diluted for double volume. 
N₁.V₁ = N₂.V₂ ; 0.2 × 100 = N₂.50ml 
N₂ = 0.4N 
Volume strength of H₂O₂ 
= N × 5.6. 6 × 0.4 = 2.24 V