Chap.06 Transition Elements

            (a)     No. of -pair                              (b)    No. of unpaired

            (c)     No. of neutron                           (d)    No. of proton

10.       Mild steel contain carbon:

            (a)     0.1 – 0.2%                                  (b)    0.2 – 0.7%

            (c)     0.1 – 1.0%                                  (d)    17

11.       To prevent corrosion, iron pipes carrying drinking water are covered with Zn by process called:

            (a)     Alloy formation                         (b)    Electroplating

            (c)     Galvanizing                                (d)    Soldering

12.       No. of -pairs accepted by the central atom in a transition metal complex is called:

            (a)     Co-ordination sphere                 (b)    Co-ordination complex

            (c)     Co-ordination number                (d)    Chelate

13.       Group VIB of transition elements contains:

            (a)     Zn, Cd, Hg                                 (b)    Fe, Ru, Os

            (c)     Cr, Mo, W                                  (d)    Mn, Te, Re

14.       Which of the following is a typical transition metal:

            (a)     Sc                                               (b)    Y

            (c)     Ra                                               (d)    Co

15.       Co-ordination number of Pt in [Pt Cl(NO2)(NH3)] is:

            (a)     2                                                 (b)    4

            (c)     1                                                 (d)    6