Question on: JAMB Chemistry - 2015

The question asks which metal can displace hydrogen from an alkaline solution. This means the metal must be more reactive than hydrogen. Here's why: * **A. Fe (Iron):** Iron is a reactive metal and can displace hydrogen from alkaline solutions under suitable conditions (e.g., high temperature). * **B. Cu (Copper):** Copper is less reactive than hydrogen and will not displace it. * **C. Cn:** This appears to be a typo and not a recognized element. * **D. Sn (Tin):** Tin is a less reactive metal than iron, and generally won't displace hydrogen in this scenario. Therefore, Iron is the most appropriate answer.