Question

A metal which melts on the palm is

• A. potassium
• B. sodium
• C. gallium
• D. phosphorous

Answer 1

The correct option is C

gallium

• Melting of any substance involves the conversion of the solid phase of that substance to its liquid phase. The temperature at which this conversion occurs is termed as melting point.
• In order to melt the metal on the palm, the metal should have a low melting point so that the heat from the palm is sufficient. Among the given elements, Gallium (Ga) has the lowest melting point and it can easily melt on the palm.

• Since the melting point of Potassium (K), Sodium (Na), and Phosphorous (P) are comparatively higher than Gallium (Ga), Potassium, Sodium, and Phosphorous do not melt on the palm. Hence, options (A), (B), and (D) are incorrect.

Hence, option (C) is correct. Gallium melts on the palm.