Write an essay on the structural ascepts of phosphorous series of acids. 

Write an essay on abiotic factors.

Write an essay on the composition of blood.

Write an essay on 'temperature as an ecofactor'.

Write an essay on the respiratory system of a human being.

Write the structure of pyrophosphoric acid.

The structure of ortho-phosphoric acid is:

The basicity of phosphoric acid is _____ .

Among the oxyacids of phosphorous the dibasic acid is

Oxides of nitrogen have open chain structures while those of phosphorous have closed chain or cage structures. Why ?

The number of P-O-P bridge in the structure of phosphorous pentoxide and phosphorus trioxide are respectively