Q1 of 53 Page 49

What are metalloids?

Metalloids refer to those class of material which possess properties of both the metals and non-metals. Examples of such materials are silicon, germanium etc. They possess fair conductivity of electricity or heat and are brittle in nature etc.


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2

Which metal has highest melting point?

 3

Some metals melt on keeping them on palm. Why? Also give an example.

 4

To avoid accidental fires, some metals are kept immersed in kerosene oil. Why?

 5

An element X is soft and can be cut with a knife easily. This is very reactive with air and cannot be kept open with air. It reacts vigorously with water. Name the element X.