Q. Match the columns:

List 1	List 2
Organic acids	Substances in which they are present
A. Lactic acid	1. Lemon
B. Acetic acid	2. Rancid butter
C. Citric acid	3. Milk
D. Butyric acid	4. Vinegar
	5. Wine

     A B C D
Answer: 3 4 1 2
Notes: • Lactic acid is found primarily in sour milk products, such as koumiss, laban, yogurt, kefir, and some cottage cheeses.
• Vinegar is 5% acetic acid. Acetic acid is a compound that, when pure, is water clear and freezes just above room temperature.
• Lemon juice and lime juice are rich sources of citric acid, containing 1.44 and 1.38 g/oz, respectively.
• Butyric acid is a fatty acid occurring in the form of esters in animal fats. The triglyceride of butyric acid makes up 3–4% of butter.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 50 in Chemistry-14-Organic Chemistry Basics in above course in App.