Copper (I) compounds are white and diamagnetic while copper(II) compounds are coloured and paramagnetic. Explain.

The compounds of iron are coloured and paramagnetic. Explain.

Account for the following: (i) Copper (I) compounds are white whereas Copper (II) compounds are coloured. (ii) Transition metals and their compounds show catalytic activities. (iii) Zn,Cd,Hg are considered as d-block elements but not as transition elements (iv) Transition metals and many of their compounds show paramagnetic behaviour. (v) Transition metals can form alloy.

(a) Account for the following : (i) Copper(I) compounds are white whereas Copper(II) compounds are coloured. (ii) Chromates change their colour when kept in an acidic solution. (iii) Zn,Cd, Hg are considered as d-block elements but not as transition elements. (b) Calculate the spin only moment of Co^(2+) (Z=27) by writing the electronic configuration of Co and Co^(2+)

Copper (I) is diamagnetic while copper (II) is paramagnetic . Explain.

Ti (III) compounds are coloured while Ti (IV) compounds are colourless.

Which of the following is copper (I) compound ?