Give reasons (a) Platinum, gold and silver are used to make jewellery. (b) Sodium, potassium and lithium are stored under oil. (c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking. (d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction

Reasons for using platinum, gold, and silver to make jewellery:

Platinum, gold, and silver are highly valued for their beauty and rarity, making them ideal for creating luxurious and precious jewellery pieces.
These metals are also known for their durability and resistance to tarnish, ensuring that the jewellery retains its shine and appearance over time.
Reasons for storing sodium, potassium, and lithium under oil:

Sodium, potassium, and lithium are highly reactive metals that can react vigorously with air and moisture in the atmosphere.
Storing these metals under oil helps to prevent their exposure to air and moisture, which can lead to oxidation and the formation of unwanted compounds.
Reasons for using aluminium to make utensils for cooking:

Despite being a highly reactive metal, aluminium forms a protective oxide layer on its surface when exposed to air.
This oxide layer prevents further reaction with air or food, making aluminium a suitable choice for cooking utensils due to its light weight, good thermal conductivity, and resistance to corrosion.
Reasons for converting carbonate and sulphide ores into oxides during extraction:

Carbonate and sulphide ores are usually less stable and more difficult to reduce directly to obtain the desired metal.
By converting these ores into oxides through processes like roasting and calcination, it becomes easier to reduce the metal oxides to obtain the pure metal during the extraction process.
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