When a metal reacts with cold water it forms Aa hydroxide Ban oxide Ca salt Doxygen

Which element reacts with water to form a metal hydroxide?

When a metal X is treated with cold water, it gives a basic salt Y with molecular formulaXOH (Molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y andZ and also write the reaction involved.

an element that reacts vigorously with cold water

Alkali metals react with water. Which two products are formed?

State the name of the substance formed when calcium oxide is reacted with water.