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Minerals in the Earth’s Crust,[object Object]
Elements in the Earth’s crust,[object Object]
Gold,[object Object],Silver,[object Object],Platinum,[object Object],Natural elements,[object Object]
Natural compounds- oxides,[object Object],Haematite – ,[object Object],iron oxide,[object Object],Cassiterite – ,[object Object],tin oxide,[object Object]
Natural compounds - carbonate,[object Object],Calcite – ,[object Object],calcium carbonate,[object Object],Malachite –,[object Object],copper carbonate,[object Object]
Natural compounds - sulphides,[object Object],Iron pyrite –,[object Object],Iron sulphide,[object Object],Galena –,[object Object],Lead sulphide,[object Object]
Hardness of minerals,[object Object],Solubility of minerals in water,[object Object],Action of heat on minerals,[object Object],Properties of minerals,[object Object]
Can be measured using Mohs’ scale,[object Object],The hardest is diamond (10),[object Object],The softest is talc (1),[object Object],Hardness of minerals,[object Object]
Most minerals are insoluble in water,[object Object],Only oxides, sulphates and carbonates of potassium and sodium are soluble in water,[object Object],Solubility in water,[object Object]
Most metal oxides are stable, do not break down when heated, except less reactive metals.,[object Object],Mercuric oxide              mercury  +  ,[object Object],                                     oxygen,[object Object],Effect of heat,[object Object]
Very hard except oxides of potassium, sodium, calcium and magnesium,[object Object],Donot dissolve in water,[object Object],Do not decompose on heating except mercury oxide,[object Object],Metal oxides,[object Object]
Break down into metal oxide and sulphur dioxide when heated,[object Object],Iron sulphide              iron oxide  +  ,[object Object],sulphur  dioxide,[object Object],Sulphur dioxide bleaches acidified potassium manganate(VII) solution from purple to colourless,[object Object],Metal sulphide,[object Object]
Metal carbonate break down into metal oxide and carbon dioxide when heated,[object Object],Calcium carbonate         calcium oxide  +  ,[object Object],                                     carbon  dioxide,[object Object],Metal carbonates,[object Object]

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