JAMB - Chemistry (2015 - No. 4)

In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by

washing under pressure

drying over phosphorus (V) oxide

passing the mixture to the limewater

using ammonical copper (I) chlorine

Washing under pressure is an action in the industrial production of H. Options B,C,D will not yield Co and H