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Answers
Apply Oil. ...
Apply a Dry Coating. .
What type of oxides are formed when non-metals combine with oxygen? When non-metals combine with oxygen they form acidic oxides.
Platinum Gold and silver are used to make jewellery because of the following reasons.
They are highly lustrous metals which are resistant to corrosion.
They are highly malleable and ductile so can be transformed into any shape or design
Sodium, potassium, and lithium can react easily with the gases present in the air or with the moisture. The oil prevents the reaction of alkali metals with air and moisture.
We can use aluminum for the making of utensils for cooking because the high reactivity of aluminum results in the formation of aluminum oxide. We get aluminum oxide when aluminum is reacted with oxygen. Aluminum oxide avoids it from additional corrosion as it plays the role of protective layer.
Sulphide ores are converted to oxides by heating in the presence of excess air. This process is known as Roasting. ... Carbonate and sulphide ores are usually converted into oxides during the process of extraction because extraction of metal is easier from their oxides rather than from their carbonates or sulphides.
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