Which of the following substances in the gaseous state should be called a vapour?
$(i)$ Helium
$(ii)$ Nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Sulphur
$(i)$ Helium
$(ii)$ Nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Sulphur
- A$(i)$ Helium
- B$(ii)$ Nitrogen
- C$(iii)$ Carbon dioxide
- D$(iv)$ Sulphur
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