Physical Property of Non-Metal - Appearance


 
 
Concept Explanation
 

Physical Property of Non Metal - Appearance

Lustre : Almost all non- metals have a dull surface. As most of them occur as powders and gases, they cannot be polished like metals. Graphite and iodine do show some luster.

Color: Some non- metals are colourless while some are coloured. For example, chlorine is a greenish- yellow gas, bromine is a brown liquid, iodine is a violet solid, and oxygen and nitrogen are colorless gases.

Non-Metals are Not Lustrous. They are Dull. This means that non-metals are not shiny, shiny, they are dull in appearance.

For example, sulphur and phosphorus are solid non-metals which do not have lustre (or shine). They are dull in appearance. There is, however, one exception. Iodine is non-metal having lustre (or chamak). Iodine has a shining surface like that of metals.

Sample Questions
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Question : 1

Which of the following are correct :

(a) Iodine is a violet solid.

(b) Oxygen and nitrogen are colorless gases.

Right Option : C
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Question : 2

Which of the following non metal is a greenish yellow gas ?

Right Option : A
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Question : 3

Which of the following non metal is solid and lustrous in appearance ?

Right Option : C
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Explanation
 
 


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