<span>When the hexene is treated with an excess of hydrogen gas and a platinum catalyst, the product formed is
hexane.
Hexene is an unsaturated hydrocarbon. Hexene when treated with H2 gas, in presence with Pt catalyst, the double bond is broken. This results in generation of saturated hydrocarbon i.e. hexane. </span>
Steam is made from boiling things and water vapor is from boiling water.
All of the the answers are are correct but a fume hood is more for if you are dealing with chemicals that can produce fumes the are deadly to people