Question

Which of the following reactions give hydrogen gas? \[ \begin{aligned} \text{I. }&\text{Reaction of tin with steam} \text{II. }&\text{Passage of steam over hot coke} \text{III. }&\text{Passage of air over hot coke} \end{aligned} \] The correct answer is

• A. I, III only
• B. I, II only
• C. I, II, III
• D. II only

Hint:

Remember the gases formed: \[ \boxed{ \text{Steam + hot coke} \rightarrow \text{Water gas }(CO+H_2) } \] \[ \boxed{ \text{Air + hot coke} \rightarrow \text{Producer gas }(CO+N_2) } \]

Answer 1

The Correct Option is B