Question

Mention two property each which makes the following metals useful in each case:
(a) Copper is used to make electrical wires. (2)
(b) Gold and platinum are preferred to make jewelry. (2)
(4 Points)

Answer 1

Answer:

a.•They are good conductors of electricity.

•These metals are ductile.

b.•the metals used in jewellery are always be chosen on the basis of its reactivity.

•GOLD and PLATINUM are highly lustrous metals and

•They are resistant to corrosion.

•They are highly malleable and ductile so can be transformed into any shape .

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Answer 2

Answer 1:-

Copper is used to make electrical wires because :-

• Copper is a good conductor of electricity because it possess large numbers of free electrons

• Copper possess very small resistivity .

• Copper is less oxidative as compared to other metals

Answer 2 :-

Gold and Platinum prefer to make jewelry because :-

• Gold and Platinum has negligible reactivity and these metals doesn't oxidised easily

• Gold and Platinum are most ductile and malleable.