Science, asked by priya4xsueGo0wt, 1 year ago

what chnges take place when cinnabar is heated in air for a long period of time? what r strategic elements? examples also

Answers

Answered by prmkulk1978
6
cinnabar[HgS] is heated in air to get oxide of the mercury which is then decomposed to pure metal on heating.
Chemical equation:
2HgS  +  3O2  -------------> 2HgO + 2SO2
2HgO ------------> 2Hg +O2
A far as strategic elements , they are the metals that are in short supply in a particular country which are needed to manufacture products that contribute to the nation's GDP or defence.
examples: Copper,Zinc, silver, lead, chromium, titanium etc


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