Give reasons for the following:
(i) Transition metals form alloys.
(ii) `Mn_2O_3` is basic whereas `Mn_2O_7` is acidic.
(iii) `Eu^(2+)` is a strong reducing agent.

Mn_2O_7 is a basic oxide.

(a) Give reasons for the following : (i) Compounds of transition elements are generally coloured. (ii) MnO is basic while Mn_(2)O_(7) acidic. (b) Calculate the magnetic moment of a divalent ion squeous medium of its atomic number is 26.

Give reasons for the following: (i) Oxygen is a gas but sulphur is a solid. (ii) O_(3) acts as a powerful oxidising agent. (iii) BiH_(3) is the strongest reducing agent amongst all the hydrides of Groups 15 elements.

Mn_2 O_3 is acidic/basic oxide.

Given reasons : Zn is not regarded as a transition element. (ii) Cr^(2+) is a strong reducing agent.

Give reasons for the following: (i) Transition elements and their compounds act as catalysts (ii) E^(@) value for (Mn^(2+) | Mn) is negative whereas for (Cu^(2+) | Cu) is positive. (iii) Actinoids show irregularities in their electronic configuration.