On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of CO2 and 0.567 g of H2O. The e — JEE Mains Chemistry Past Papers Chemistry Question
Question
On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of CO2 and 0.567 g of H2O. The empirical formula mass of compound (X) is________g. (Given molar mass in g mol–1 C : 12, H : 1, O : 16) (A) 30 (B) 45 (C) 15 (D) 60
Answer: A
💡 Solution & Explanation
n(CO2) = 44 . = 0.0332 So, n(C) = 0.0332 n(H2O) = 567 . = 0.0315 So, n(H) = 0.063 n(O) = 1 . 12 . 1 = 0.0336 C : H : O = 0.0332 : 0.063 : 0.0336 1 : 2 : 1 Empirical Formula = CH2O Empirical formula mass = 12 + 2 + 16 = 30. | JEE(Main) 2025 | DATE : 02-04-2025 (SHIFT-1) | PAPER-1 | CHEMISTRY PAGE # 4
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