Question

10 ml of a sample of H₂O₂ solution liberates 112 ml of O₂ gas at STP upon decomposition. Identify the correct statement(s) :

(A) Normality of the above sample of H₂O₂ is 0.5 N

(B) 15 ml of the same sample of H₂O₂ solution liberates 224 ml of O₂ gas at 1.5 atm and 273°C

(C) Milliequivalents of hypo required for the titration of liberated I2 when 10 ml of the same sample of H₂O₂ solution is treated with excess of acidified solution of KI are 20

(D) % (w/v) of given sample of H₂O₂ is 3.4 %

Answer 1

Correct option (B,C,D)

Explanation:

10 ml of H₂O₂ solution liberates 112 ml O₂ at STP 

∴ 1 L of H₂O₂ solution liberates 11.2 L O₂ at STP 

∴ volume strength of H₂O2 solution = 11.2 V