Chapter 26

Writes short notes on (a) Nephelauxetic series (b) Magnetic susceptibility

Give reasons for the following: (a) \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) is pale coloured. (b) Anhydrous \(\mathrm{CuSO}_{4}\) is white but \(\mathrm{CuSO}_{A} .5 \mathrm{H}_{2} \mathrm{O}\) is blue in colour.

What do you understand by magnetic susceptibility. Discuss Guoy's method for the measurement of magnetic susceptibility.

What is the origin of diamagnetism and paramagnetism? Discuss the effect of temperature on diamagnetic and paramagnetic susceptibility.

Discuss the theory of the following methods used for the measurement of magnetic susceptibility: (a) Faraday's method (b) Evan's method

Write short notes on (a) Ferrimagnetism (b) Super exchange

Discuss the theory of ferromagnetism.

Discuss the effect of multiplet separation on effective magnetic moment.

Discuss quenching of orbital momentum in detail.

Give reason for the higher values of experimental magnetic moment than expected in case of \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) and \(\left(\mathrm{NiCl}_{4}\right)^{2-}\) complexes.