A word equation contains the names and chemical formulae of the compounds involved in the reaction.

A word equation of a chemical reaction is a way to describe chemical reactions using the names of substances involved.

Name the metal which is extracted from the ore called 'Rock salt'
(b) Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
(c) Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equation of the reactions involved.
(d) In the electrolytic refining of a metal M, what would you tak eas anode, cathode and electrolyte?
(e) Name any five metals which are purified by electrolytic refining method.

An organic compound 'A' has molecular formula ${\text{C}}_2{\text{H}}_4{\text{O}}_2$and is acidic in nature. On heating with alcohol and conc. sulphuric acid, vapours with pleasant or fruity smell are given out. What is this chemical compound 'A' and what is the chemical equation involved in the reaction? [3 MARKS]