JEE Main 2025 Chemistry question
0.01 mole of an organic compound (X) containing 10% hydrogen, on complete combustion produced 0.9 g H₂O. Molar mass of (X) is g mol.
Answer: 100
Solution
Moles of H₂O = 0.05, moles of H = 0.1 = moles of H in 0.01 mol compound. Wt of H in 1 mol = 10 g. 10% = 10/M × 100, so M = 100.