1. Cooking products, fats and vegetable oils, are mixtures of saturated and unsaturated esters.

 The degree of unsaturation can be estimated by the following experiment. 4 drops of the oil are dissolved in 5 cm³ of ethanol. Dilute bromine water is added a drop at a time until the brown colour no longer disappears. Enough bromine has been added to the sample to react with all the double bonds.

i) Complete the one blank space in the table. 

[1]

ii) Complete the equation for bromine reacting with a double bond.

[2]

 iii) Using saturated fats in the diet is thought to be a major cause of heart disease.  

Which of the products is the least likely to cause heart disease? 

[1]