Which of the following are physical rather than chemical properties of hydrogen gas (h2)? choose one or more:
a. liquefied h2 boils at a very low temperature (–253.7°c).
b. h2 gas does not conduct electricity.
c. at room temperature, its density is less than that of any other gas.
d. it reacts vigorously with oxygen (o2) to form water.

A. Liquefied boils at a very low temperature (–253.7°C).

B. gas does not conduct electricity.

C. At room temperature, its density is less than that of any other gas.

Explanation:

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

Example: reacts vigorously with oxygen to form water.

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Example: Liquefied boils at a very low temperature (–253.7°C).It only changes state.

gas does not conduct electricity.It is only about movement of electrons.

At room temperature, density is less than that of any other gas. It is only about mass present per unit volume.