Q3 of 53 Page 49

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

Some metals melt on keeping them on palm because such metals have very low melting point compared to other metals. Examples of such metals are Gallium and caesium.


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1

What are metalloids?

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Which metal has highest melting point?

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

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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.