Question

A metal E is stored under kerosene. When a small piece is left in air, catches fire a) name the metal E b) write the balanced chemical equation when metal is exposed to air and is dissolved in water

Answer 1

a)sodium is the correct answer.

Answer 2

a)Sodium is the metal which is kept under kerosene.
b) let's take the example of magnesium metal.
when magnesium exposed to air.
2Mg+O2=2MgO
when it is dissolved in water it forms metallic oxide which is basic in nature.
MgO+H2O=Mg(OH)2