Q4. Mention two uses of the following metals and non-metals.
(A) Iron
(B) Aluminium
(C) Gold
Answers
Answer:
A ) It is used to manufacture steel and also used in civil engineering like reinforced concrete, girders etc.
Iron is used to make alloy steels like carbon steels with additives such as nickel, chromium, vanadium, tungsten, and manganese.
These are used to make bridges, electricity pylons, bicycle chains, cutting tools and rifle barrels.
Cast iron contains 3–5% carbon. It is used for pipes, valves, and pumps.
Iron catalysts are used in the Haber process for producing ammonia.
Magnets can be made of this metal and its alloys and compounds.
B) Power lines.
High-rise buildings.
Window frames.
Consumer electronics.
Household and industrial appliances.
Aircraft components.
Spacecraft components.
Ships.
c)Wealth protection and a financial exchange. One of the oldest uses of gold is for coins, and other financial assets.
Jewellery, adornments and medals.
Electronics.
Space exploration.
Medicine and dentistry.
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Explanation: