Which of the following substances in the gase | vedclass

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(D) substance is called a vapour if it exists as a liquid or solid at room temperature $(25^{\circ}C)$ and standard atmospheric pressure,but is presen

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$(iv)$ Sulphur

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(D) substance is called a vapour if it exists as a liquid or solid at room temperature $(25^{\circ}C)$ and standard atmospheric pressure,but is present in the gaseous state.Helium,nitrogen,and carbon dioxide are gases at room temperature.Sulphur is a solid at room temperature,but it can exist in a gaseous state (vapour) upon heating. Therefore,sulphur in the gaseous state is called a vapour.

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

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