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?

CO₂ and NH₃

CO and NH₃

SO₂ and H₂O

CO₂ and H₂O

SO₂ and NH₃

Explanation

All saturated hydrocarbons are attacked by oxygen at elevated temperatures and, if oxygen is in excess, complete combustion to carbon dioxide and water occurs.

JAMB - Chemistry (1985 - No. 19)

Explanation

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