Question

The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical method from a compound of nitrogen. This is due to the presence of the following in nitrogen gas in air :

• A. $Ar$
• B. $C{O}_2$
• C. $O_2$
• D. $N_2$ with ${}^{15}N$ isotope

Answer 1

The correct option is A $Ar$

Noble gases generally inert and do not participate in chemical reactions. Air contains traces of Argon in it so during preparation of nitrogen gas it has more density.