Question

Why the oxygen is called the gas

Answer 1

because it is in gaseous state

Answer 2

Oxygen is the base of our life. All humans, animals need oxygen. Animals exhale oxygen and humans intake the oxygen.
Oxygen is a gas because :

1) Oxygen cannot be compressed. Which is a property of gaseous state.

2) Oxygen has no shape or volume. Which is also the property of gas.

So, these two points clearly describes oxygen to be a gas.

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