Question

When steam is passed over hot coke, it produces:

• A. producer gas
• B. synthesis gas
• C. tear gas
• D. coal gas

Answer 1

Answer: (B)

Synthesis gas is made by passing steam over a red-hot carbon fuel such as coke:
$H_{2}O+C\to H_2+CO(\delta H=+131KJ/mol)$
Synthesis gas is a useful product, but requires careful handling due to its flammability and the risk of carbon monoxide poisoning