Question

Answer the following questions :
(a) Give scientific reason : Platinum, gold and silver are used to make jewellery.
(b) Give three examples of corrosion.​

Answer 1

Answer:

(a) Platinum, gold and silver are used to make jewellery because these are low reactive metals. So they rarely corrode and hence do not lose their shine and lustre.

Corrosion is usually defined as the degradation of metals due to an electrochemical process. The formation of rust on iron, tarnish on silver, and the blue-green patina that develops on copper are all examples of corrosion.

Answer 2

Answer:

a) Platinum, gold and silver are used to make jewellery because the metals used in jewellery are always be chosen on the basis of its reactivity. ... They are highly lustrous metals which are resistant to corrosion. They are highly malleable and ductile so can be transformed into any shape or design.

b) The formation of rust on iron, tarnish on silver, and the blue-green patina that develops on copper are all examples of corrosion.