You are at question (MCQ) number 5 and Test Number 10 of Chemistry: All topics. To deal with Chemistry questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.
The question: Which is known as ‘noble gas’?
.... with options: Hydrogen, Oxygen, Helium, Carbon dioxide can be solved with the concepts and understanding of Chemistry.
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