Discussion
Consider the following statements about fluorochemical finishes.
1. They repel both water and oil.
2. Long chain types have come under environmental restriction.
3. Silicones give equally good oil repellency.
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: fluorochemicals repel both liquids, and the long chain C8 types have been restricted because their perfluorooctanoic degradation products are persistent and bioaccumulative, driving the shift to C6 chemistry and to non-fluorinated alternatives. Statement 3 is wrong - silicones repel water well and oil hardly at all.
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