Question

Approximate size of fat globules in milk solution is ______________

(a) 10^–2 to 10^–3

(b) 10^–4 to 10^–5

(c) 10^–5 to 10^–6

(d) 10^–6 to 10^–7

This question was posed to me during a job interview.

This intriguing question originated from Composition of Cow Milk in division Chemistry of Milk of Dairy Engineering

Answer 1

Right choice is (a) 10^–2 to 10^–3

To explain: Size of fat globules in milk solution is 10^–2 to 10^–3. Fat is bound in the globular form by phospholipids membranes, which are hydrophobic.