Question

Compare how the Sudan test reacted with whole milk, low-fat milk, and skim milk?

1) The Sudan test reacted differently with each type of milk.
2) The Sudan test did not react with any of the milk types.
3) The Sudan test reacted the same way with all three types of milk.
4) The Sudan test is not suitable for testing milk.

Answer 1

The Sudan test reacts differently with whole milk, low-fat milk, and skim milk due to the varying fat content, with whole milk reacting the most and skim milk the least or not at all. The answer is 1).

Step-by-step explanation:

When comparing how the Sudan test reacted with whole milk, low-fat milk, and skim milk, we are looking at the ability of the dye to stain fats present in the samples. The Sudan Red dye is known for staining waxy, hydrophobic materials, which include fats in the milk. Whole milk, having the highest fat content, would show a stronger reaction or more intense staining with the dye compared to low-fat milk and skim milk. Skim milk, having little to no fat, would exhibit the least staining or possibly no reaction. Therefore, the answer is 1) The Sudan test reacted differently with each type of milk because each has a different fat content.