Multiple choice

Water gas is prepared by passing ____.

  1. steam over white hot coke

  2. air over red hot coke

  3. methane over red hot coke

  4. steam over heated sulphur

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water gas (CO + H2 mixture) is produced by passing steam over white-hot coke (carbon) at about 1000°C. The endothermic reaction is: C + H2O → CO + H2. This is an important industrial gas mixture.