Give one word or a phase for the following statements :

The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged iron.

Give one word or a phase for the following statements :

Process of formation of ions from molecules which are not in the ionic state.

Give one word or a phase for the following statements :

The tendency of an element to form chains of identical atoms.

Give one word or a phase for the following statements:

The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.

Give one word or a phase for the following statements:

The process by which sulphide ore is concentrated.

16.

Write a balanced chemical equation for each of the following :

The action of concentrated sulphuric acid on carbon.

Write a balanced chemical equation for each of the following :

Reaction of sodium hydroxide solution with iron (III) chloride solution.

Write a balanced chemical equation for each of the following :

The action of heat on aluminium hydroxide.

Write a balanced chemical equation for each of the following :

A reaction of zinc with a potassium hydroxide solution.

Write a balanced chemical equation for each of the following :

The action of dilute hydrochloric acid on magnesium sulphite.