Question

05. Glve reasons
a-Copper is used for making electrical cables.
b-Silver foil is used for decorating foodstuffs.
C-Pure gold cannot be used for making jewellery.​

Answer 1

Answer:

a) copper is a highly conductive metal. This means electricity can pass through it with greater ease, making it ideal for use in electrical wires.Copper has low resistivity, and therefore is an excellent conductor. Copper is also less oxidative than other metals.

b)Silver is used as it is fancy as well as has a property of maintaining the temperature.

c)we can't use pure gold in making ornaments ​cause they are not hard. To prevent this gold is alloyed with either silver or copper. This alloy is hard enough for making ornaments. Generally 22 carot gold is used in making ornaments.

Answer 2

a) copper is a good conductor of
electricity
b) it is used so that the food remains hot
c) pure gold is not hard it is soft that’s
That’s why they don’t use pure gold