Let the mass of acetaldehyde is xg, then mass of ethanol is (0.535−x)g. When acetaldehyde is heated with Fehling solution, it gives 1.2g of a red precipitate. CH3CHO+2CuO→CH3COO−+
Cu
Redppt.
2O ∵143g of Cu2O is coming from =44g of CH3CHO ∴1.2g of Cu2O is coming from