(a) What is the difference between a mineral and an ore? (b) Which metal is extracted from cinnabar ore? (c) Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula. (d) How is sodium metal extracted? Explain with the help of equation of the reaction involved. Name three other metals which are extracted in a manner similar to sodium.

(a) Minerals are naturally occurring metals or their compounds wheareas ominerals containing good quantity of metals that can be profitably mined are called ores. (b) Mercury. (c) Rock salt - Sodium chloride, NaCl. (d) Sodium metal is extracted by the electrolytic reduction of molten sodium chloride. When electric current is passed through molten sodium chloride, it decomposes to form sodium metal and chlorine gas. 2NaCl(l) → 2Na(s) + Cl2(g) (e) Potassium, calcium and magnesium.