question_answer 53)

    The oxidation state of central atom in the anion of compound  will be........... (a) + 3                                   (b) +5           (c) + 1                                    (d)-3

Answer:

                                (c) Let oxidation state of P in  is x                   1+ 2 x 1+ x + 2 x - 2 = 0                        1 + 2 + x ? 4 = 0                                + x - 1 = 0                                      x = + 1