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