Oxygen is a colourless, odourless and tasteless gas.
It is tasteless, colourless and odourless gas, which is exceedingly stable and inert.
Nitrogen is a colourless, tasteless and odourless gas, which is only very slightly soluble in water.
It is non-volatile in steam, and is odourless.
As the carbon content of the molecule increases, they become less soluble in water, and their smell becomes less marked with the increase in boiling point, the highest members of the series being odourless solids, which can only be distilled without decomposition invacuo.