JEE Advanced levelOne or more correct optionsDifficulty 3 of 3mc183
Compound X has 40.0% C, 6.67% H and 53.3% O by mass and molar mass 60gmol−1. Glucose is CX6HX12OX6 (C = 12, H = 1, O = 16). Select the correct statement(s).
A6g of X contain 0.2mol of H atoms.
BX and glucose have the same percentage composition.
CThe molecular formula of X is CX2HX4OX2.
DThe empirical formula of X is CHX2O.
Answer: B, C, D
C : H : O = 3.33 : 6.67 : 3.33 = 1 : 2 : 1, so empirical formula CH2O (mass 30), and 60/30 = 2 gives C2H4O2. Glucose is (CH2O)6, so the percentage composition is identical. 6 g of X = 0.1 mol, which has 0.4 mol H atoms, not 0.2.