question_answer

The maximum number of P?H bonds are contained in which of the following molecules?

A)  \[{{H}_{3}}P{{O}_{2}}\]                

B)  \[{{H}_{3}}P{{O}_{3}}\]

C)  \[{{H}_{3}}P{{O}_{4}}\]                

D)  \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]

Correct Answer: A

Solution :

                 The structures of the given oxyacids of phosphorus are as                                                        \[{{H}_{3}}P{{O}_{2}}\]                                  \[{{H}_{3}}P{{O}_{3}}\]                     (No P?H bond)                  (No P?H bond)                                                                         \[{{H}_{3}}P{{O}_{4}}\]                                        \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]             (No P?H bond)                (No P?H bond) Thus, \[{{H}_{3}}P{{O}_{2}}\] contains the maximum number of P?H bonds.