25.In Dumas method for estimation of Nitrogen, 5.6g of an organic compound gave 448ml of N2 at STP. The percentage composition of Nitrogen in the compound = x% Calculate x. [Given: molar volume of gas at STP = 22.4L] 26.A compound 'X' dimerizes in benzene to a certain extent. A solution containing 0.2 Kg of 'X' in 2.0 Kg of benzene has it boiling point elevated by 5.04 K. The degree of association of 'X' dimerized is a. Then 100a will be [K(C6H6) = 2.52 K/m; Mol wt. of X = 40]