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  4. The liquefied metal expanding on solidification is :

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Q. The liquefied metal expanding on solidification is :

AIIMSAIIMS 2004The p-Block Elements

Solution:

Gallium (At. no. $31$) is soft, silvery metal placed in IIIA group in periodic table. Its melting point is $30^{\circ} C$. This metal expands by $3.1 \%$ when it solidifies and hence, should not be stored in glass or metal containers. Gallium also corrode other metals.