Chap.06 Transition Elements

What is formula of haematite:

            (a)     FeS2                                            (b)    FeO3

            (c)     Fe2O3                                          (d)    Fe3O4

2.         Which is non-typical transition elements:

            (a)     Cr                                               (b)    Mn

            (c)     Zn                                               (d)    Fe

3.         Highest oxidation state of Mn in which compound:

            (a)     K2MnO4                                     (b)    KMnO4

            (c)     MnO                                           (d)    MnO2