Electrolysis of water is a

Cambium is an example of

What is the colour of the precipitate obtained by passing CO₂ gas through lime water?

A free neutron decays spontaneously into a proton, an electron and ……… .

The metal used to recover copper from a solution of copper sulphate is

When air is blown from mouth into a test tube containing limewater, the limewater turns milky. This is due to the presence of