HOTS A container made of same metal when exposed to
humid climate develops green coating.
Identify the metal. Give reason for both a & b.

The metal is copper, because when copper is exposed to the humid climate, a green stuff called patina is formed around the shiny surface of the metal.

Nonmetals usually react by gaining electrons

What are the options? physical property can be color, smell, opacity, viscosity, density, infra red spectrum, melting and boiling points, attraction and repulson to magnets, etc.