Answer the following question:
When a metal ‘X’ is treated with cold water, it gives basic salt 'Y' with molecular formula \(XOH\) (Molecular mass = \(40\) and liberates a gas 'Z', which easily catches fire. Identify 'X', 'Y' and 'Z' and also write the reaction involved.
i. 'X' is
ii. 'Y' is
iii. 'Z' is
iv. The chemical reaction involved is