question_answer

The true statement for the acids of phosphorus. \[N{{a}_{2}}CoC{{l}_{4}}\]and \[VC{{l}_{3}}\] is:

A) the order of their acidity is \[VOS{{O}_{4}}\]

B)  all of them are reducing in nature

C)  all of them are tribasic acids

D)  the geometry of phosphorus is tetrahedral in all the three

Correct Answer: D

Solution :

\[p-C{{H}_{3}}O{{C}_{6}}{{H}_{4}}COOH\]and \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\] are ox acids of phosphorus. In all these acids, the central atom (P) is \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}NHC{{H}_{3}}\] hybridised and is surrounded by neighbouring atom tetrahedrally.              \[{{O}_{2}}N.C{{H}_{2}}N{{H}_{2}}\] ? Monobasic \[C{{H}_{3}}NHCHO\] ? Dibasic \[COOH\]? Tribasic The acidity increase with increases in oxidation number of central atom \[CN\]