Question

The liquefied metal expanding on solidification is :

• A. Ga
• B. Al
• C. Zn
• D. Cl

Answer 1

Answer: (A)

Ga

Answer 2

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.