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Q.

A 2ml solution of H2O2 liberated 0.127gm of I2 from KI in acidic medium. The volume strength of H2O2 is ( Round off to nearest integer)

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answer is 3.

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Detailed Solution

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H2O2+2KI+H2SO4→K2SO4+I2+2H2O

No. of. Eq  H2O2 = No.Of. Eq . I2

N×21000=0.127127⇒N=0.5

Volume strength = N×5.6=0.5×5.6=2.8≈3

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A 2ml solution of H2O2 liberated 0.127gm of I2 from KI in acidic medium. The volume strength of H2O2 is ( Round off to nearest integer)