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Question

0.5g of fuming H2SO4 oleum is diluted with water. This solution is completely neutralized by 26.7 ml of 0.4 N NaOH. The correct statement is/are (1) Mass of SO3 is 0.104g (2) % of free SO3 = 20.7% (3) Normality of H2SO4 for neutralization is 0.2N (4) Weight of H2SO4 is 0.104g

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