There are several forms of solid phosphorus but only red and white forms are important. The white phosphorus consists of discrete tetrahedral `P_(4)` molecules. The structure of red phosphorus has not yet been completely determinated but there are evidences that it is polymeric and consists of chains of `P_(4)` tetrahdedral linked together. at room temperature , stable modification of elements phosphorus is red form. because of its highly polymerised structure, it is less volatile and less reactive than white phosphorus. in most of its compounds, phosphorus can have a valency of 3 or 5. phosphorus acid is peculiar because although it contains three hydrogen atoms per molecule, only two dissociation.
The two hydrogen atoms of phosphorus acid are acidic because.
A. All the hydrogen atoms are attached to phosphorus
B. All the hydrohen atoms are attached to oxygen
C. two hydrogen atoms are attached to oxygen
D. two hydrohen atoms are attached to posphorus