Photo AI
Oils contain carbon to carbon double bonds which can undergo addition reactions with iodine - Scottish Highers Chemistry - Question 8 - 2015
Question 8
Oils contain carbon to carbon double bonds which can undergo addition reactions with iodine. The iodine number of an oil is the mass of iodine in grams that will re... show full transcript
Worked Solution & Example Answer:Oils contain carbon to carbon double bonds which can undergo addition reactions with iodine - Scottish Highers Chemistry - Question 8 - 2015
Step 1
Which line in the table shows the oil that is likely to have the lowest melting point?
Answer
To determine which oil is likely to have the lowest melting point, we must consider the relationship between iodine number and melting point. Oils with higher iodine numbers typically contain more unsaturated fats, which tend to have lower melting points.
Examining the table:
- Corn: 123
- Linseed: 179
- Olive: 81
- Soya: 130
Among these options, Olive oil has the lowest iodine number at 81, indicating it has the most saturated fats and is therefore likely to have the highest melting point, which implies it is less likely to be liquid at room temperature.
In contrast, Linseed oil, with the highest iodine number of 179, means it has the most unsaturated fats and thus a lower melting point compared to the others. Therefore, the answer is:
B. Linseed