Question

Acrolein test is positive for:

• A. polysaccharides
• B. proteins
• C. oils and fats
• D. reducing sugars

Answer 1

Answer: (C)

oils and fats

Answer 2

Acrolein test is positive for oils and fats.

When fat is heated in the presence of $KHSO _{4}$ (dehydrating agent) the glycerol portion of the molecule is dehydrated and forms an unsaturated aldehyde $CH _{2}= CH - CHO$ (acrolein), a bed-smelling compound. Such pungent irritating odor or smell of acrolein confirms the presence of fat or oil. It is the test for fat.

Therefore, option C is the correct answer.