Apparatus: Test tubes, droppers, etc.
Chemicals : Tincture iodine, bromine water, liquefied vanaspati ghee, various vegetable oils (peanut, safflower, sunflower, olive, etc.)
Procedure : Take 4 mL oil in a test tube and add 4 drops of tincture iodine or bromine water in it. Shake the test tube. Find out whether the original colour of bromine or iodine disappears or not. Repeat the same procedure using other oils and vanaspati ghee.
Which of the substances do contain multiple bonds ?

Explanation

Peanut, safflower, and olive oils contain multiple carbon-carbon bonds while vanaspati ghee contains single carbon-carbon bonds.