P Block Elements

when dissolved in results in a violet coloured solution

\underset{\mathrm{White \, ppt}{ { BiOCl }}

White phosphorus is the most reactive form of phoshorus.

undergoes sublimation.

Elements belonging to the group of modern periodic table are known as inert gases or noble gases. Their general electronic configuration is . They are called so because they have eight electrons (Octet) in their outermost shell (except Ile which has electrons) due to which they are unreactive i.e., no tendency to lose or gain or share electrons. Besides hydrogen has got electron oxygen bas electrons and nitrogen has electrons in the gutermost shelll, which cause them to react and form and molecules. All inert gases are monoatomic , have only one atom in their molecule.

For structure of

The structure of is squar planar due to the presence of two lone pair.

At the junction of salt formation and solution with conc. a brown ring is obtained

In limited supply of oxygen, burns with blue flame and and are the main products. In excess of oxygen, gives and water as main product.

As the size of halogen atom increases, the boiling point of hydrogen halides increases. However, has the highest boiling point among the hydrogen halides because of -bonding and Boiling point Thus, is least volatile among hydrogen halides.

When bromine water reacts with , it oxidises it to sulphuric acid and itself gets reduced to .

conc.

Aluminium oxide is highly stable therefore, it is not oxidised by chemical reactions.