It is given that oxygen is a common noun But how Oxygen is name of a particular gas - English - Nouns

Question

It is given that oxygen is a common noun But how? Oxygen is name
of a particular gas Help me

Pratibha Kumari · Accepted Answer

Please follow the link
given below:

https://www meritnation
com/ask-answer/question/certified-expert-says-oxygen-is-a-common-noun-all-other-thr/nouns/4734448

It is given that oxygen is a common noun. But how? Oxygen is name of a particular gas. Help me.