Chemistry, asked by HEMANTKUMARCHOPRA, 1 year ago

give reason Platinum gold and silver are used to make Jewellery Sodium Potassium and Lithium are stored under oil Aluminium is highly reactive metal yet it is used to make utensils for cooking copper is used to make hot water tanks and hot steel determinist copper vessels are cleaned with lime or terminate juice why this sour substance are effective in cleaning vessels

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Answered by nitin9906
0

Answer:

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Answered by RIya26283
1

(a) Platinum, gold, and silver are used to make jewellery because they are very lustrous. Also, they are very less reactive and do not corrode easily.

(b) Sodium, potassium, and lithium are very reactive metals and react very vigorously with air as well as water. Therefore, they are kept immersed in kerosene oil in order to prevent their contact with air and moisture.

(c) Though aluminium is a highly reactive metal, it is resistant to corrosion. This is because aluminium reacts with oxygen present in air to form a thin layer of aluminium oxide. This oxide layer is very stable and prevents further reaction of aluminium with oxygen. Also, it is light in weight and a good conductor of heat. Hence, it is used to make cooking utensils.

(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction because metals can be easily extracted from their oxides rather than from their carbonates and sulphides

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