Answer: Option (C) is the correct answer.
Step-by-step explanation:
A property that does not bring any change in chemical composition of a substance are known as physical properties.
For example, change in shape, size, mass, volume, density, etc are all physical properties.
Whereas a property that brings changes in chemical composition of a substance are known as chemical properties.
For example, reactivity, toxicity, combustibility etc are all chemical properties.
Thus, we can conclude that it reacts explosively with oxygen represents a chemical property of hydrogen gas.