Question

Which of the following methods is used to measure the water content of food?

• A. \(\text{Formol titration}\)
• B. \(\text{Zak's method}\)
• C. \(\text{Polarimetry}\)
• D. \(\text{Karl Fischer titration}\)

Hint:

Karl Fischer titration is a widely used method for accurate water content measurement in food, chemicals, and pharmaceuticals.

Answer 1

The Correct Option is D

Step 1: Understanding water content measurement. - Karl Fischer titration (KFT) is a precise method used for determining the water content in various substances, including food and pharmaceuticals.
Step 2: Explanation of incorrect options.
- Formol titration (A): Used to measure protein content, not water content.
- Zak's method (B): Used to determine sugar content, not suitable for water measurement.
- Polarimetry (C): Measures optical activity, not water content.
Step 3: Selecting the correct option. Since Karl Fischer titration is the standard method for water content determination, the correct answer is (D) Karl Fischer titration.