Chemistry Past Questions and Answers

The process of converting starch to ethanol is

The polymer used in making car rear lights is

CH₃COOC₂H₅(1) + H₂O₍₁₎ ⇌ CH ₃COOH _(aq) + C ₂H ₅OH _(aq)
The purpose of H⁺ in the reaction above is to

A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.
[C = 12, H = 1]

Polystyrene is widely used as packaging materials for fragile objects during transportation because of its