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Question

50 ml of an aqueous solution of H2O2 were treated with an excess of KI solution and dilute H2SO4. The liberated iodine required 20 mL of 0.1NNa2S2O3 solution for complete interaction. The concentration of H2O2 in g/L is:

A
0.68 g/L
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B
0.88 g/L
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C
0.67 g/L
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D
0.78 g/L
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