JEE Main 2024 — General Principles and Processes of Isolation of Metals Question with Solution

Fluorine is present mainly as insoluble fluorides (fluorspar ${\mathrm{CaF}}_2$, cryolite ${\mathrm{Na}}_3{\mathrm{AlF}}_6$ and fluoroapatite $3{\mathrm{Ca}}_3({\mathrm{PO}}_4 {)}_2 .{\mathrm{CaF}}_2$ ). Sea water contains chlorides, bromides and iodides of sodium, potassium, magnesium and calcium, but is mainly sodium chloride solution (2.5% by mass). The deposits of dried up seas contain these compounds, e.g., sodium chloride and carnallite, $\mathrm{KCl}.{\mathrm{MgCl}}_2 .6{\mathrm{H}}_2\mathrm{O}$.