Question

Identify the sets in which both the metals react with water? \[ \text{I.}\quad Be,\ Mg \] \[ \text{II.}\quad Li,\ Mg \] \[ \text{III.}\quad Na,\ K \] \[ \text{IV.}\quad K,\ Ca \]

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

Hint:

Reaction with cold water: \[ K \gt Na \gt Ca \gt Mg \gt Be \] \[ Be \rightarrow \text{No reaction} \] \[ Mg \rightarrow \text{Reacts mainly with hot water/steam} \] \[ Na,\ K,\ Ca \rightarrow \text{React with water} \]

Answer 1

The Correct Option is C