JAMB - Chemistry (1985 - No. 19)
A colourless organic compound X was burnt in excess air to give two colourless and odourless gases, Y and Z, as products. X does not decolorize blue bromine vapour, Y turns lime milky while Z gives a blue colour with copper (ll) tetraoxosulphate (IV).
Y and Z are respectively?
Y and Z are respectively?
CO2 and NH3
CO and NH3
SO2 and H2O
CO2 and H2O
SO2 and NH3
解释
All saturated hydrocarbons are attacked by oxygen at elevated temperatures and, if oxygen is in excess, complete combustion to carbon dioxide and water occurs.