Question

Lustre of the non-metal can be seen in
1. sulphur
2. phosphorus
3. iodine
4. All of the above

Answer 1

Correct Answer - Option 3 : iodine

• Luster means shiny appearance. 
• Metals usually show the property of being lustrous. 
• Nonmetals usually have a dull appearance. 
• But, iodine is an exception. 
• Iodine is a non - metal that has a shiny or lustrous appearance. 

The correct option is Iodine.

Physical Properties	Metals	Non - Metals
Electrical Conductivity	Metals are good conductors of electricity.	Non -Metals are poor conductors of electricity.
Sonorous	Metals are sonorous which means the ringing sound is produced when they are hit.	Non -metals are non-sonorous.
Malleability	Metals can be converted into thin sheets and hence are malleable.	Non - metals cannot be converted into thin sheets and hence are non Malleable.
Ductility	Metals can be drawn into thin wires.	Non -metals cannot be drawn into thin wires and hence are non - ductile.
High melting and Boling point	Metals have high melting and boiling point. They are usually solid at room temperature.	Non - metals are having low melting point and boiling point. They can be solid, liquid or gas at room temperature.