Give reasons for the following :

Give reasons for the following :
(a) LiI is covalent in nature.
(b) Li is kept wrapped in paraffin wax and not stored in kerosene.

(a) Because of the small size and higher polarising power lithuim halides except LiF are predomintly covalent.
(b) Lithium can not be stored in kerosene as it floats on the surface of kerosene because of its jlow density. Therefore, lithium is generally kept |wrapped in paraffin wax.
© Due to small size and high ionisation enthalpy, Be forms coordination compound.