question_answer

  (a) Give reasons ; (i) The highest oxidation state of a metal is exhibited in oxides and fluorides.                                                                      1 (ii) With configuration in is reducing whereas in is oxidizing.                                                            1 (iii) Transition element has high heat of atomization.                                                                                                       1 (b) Complete the following reaction: (i)                                                                                                                                                 1 (ii)                                                                                                                                                   1

Answer:

                  (a) (i) Because of small size of their atoms oxygen and fluorine they can form strong bonds which may also                 facilitate the multiple bonding.                                                                                                                                                  1 (ii) The 3rd ionisation energy is relatively low as it results in configuration which is more stable than whereas in the case of Mn the 3rd ionisation energy is very high as the 3rd electron is to be removed from an extra stable configuration.                                                                                                                                             1 (iii) Due to strong interatomic attraction in d-orbitals d-electrons.                                                              1 (b) (i)                                                                             1 (ii)                                                                                                     1