Question

Choose the incorrect statement regarding the physical properties of metals and non-metals.

• A. Sodium can be cut like a soap.
• B. Caesium melts when kept on palm.
• C. Graphite is a good conductor of electricity.
• D. Melting point of gallium is 170°C.

Answer 1

The correct option is D Melting point of gallium is 170°C.

-Caesium and gallium, though being metals, have really low melting points so they melt when kept on the palm. The melting point of gallium is 29 °C.
-Sodium is an alkali metal and is soft enough to be cut with a knife.
-Graphite is an allotrope of carbon and is a good conductor of electricity.