Question

a) Platinum golden silver are used to make jewelry why?
b) sodium, potassium and lithium stroed under oil, way

Answer 1

1. because they are all noble metals and they dont get corrode as there is porous layer

Answer 2

a) bcz they comes in the least reactive metals.. they do not get corroded easily
they are ductile
they are maleable
they are lustrous
B)bczz they are highly reactive metals
they react very easily with air ..so to secure them they r kept under kerosene which break the supply of air