When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z
The base with molecular mass 40 is NaOH. Hence, the metal X must be sodium (Na). It reacts with H2O to form the base NaOH and liberates H2 gas which easily catches fire.
