Uses of alkali metals:
i. Lithium metal is used to make useful alloys. For example with lead it is used to make ‘white metal’ bearings for motor engines, with aluminium to make aircraft parts, and with magnesium to make armour plates. It is used in thermonuclear reactions.
ii. Lithium is also used to make electrochemical cells.
iii. Lithium carbonate is used in medicines
iv. Sodium is used to make Na/Pb alloy needed to make Pb(Et)4 and Pb(Me)4. These organolead compounds were earlier used as anti-knock additives to petrol, but nowadays lead-free petrol in use.
v. Liquid sodium metal is used as a coolant in fast breeder nuclear reactors. Potassium has vital role in biological systems.
vi. Potassium chloride is used as a fertilizer. Potassium hydroxide is used in the manufacture of soft soap. It is also used as an excellent absorbent of carbon dioxide.
vii. Caesium is used in devising photoelectric cells.
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