NCERT Exercise 3.1 — Q12 - Metals and Non-metals
Question: 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.
Answer: 1. Metals show diverse physical and chemical properties that dictate their applications. 2. Platinum, gold, and silver are noble metals located at the bottom of the reactivity series. 3. They are h...
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