A 5.25 % solution of a substance is isotonic with a 1.5% solution of urea (molar mass = 60 g mol^−1) in
the same solvent. If the densities of both the solutions are assumed to be equal to 1.0 g cm^−3, molar mass of the substance will be
JEE Main 2007 · Annual, Paper 1 · Q1991