Question

Richert-Meissl number is defined as the volume of 0.1M KOH solution required for the neutralisation of _______ gram/grams of fat or oil.

(a) 1

(b) 5

(c) 100

(d) 1000

I have been asked this question during an internship interview.

My enquiry is from Oils and Fats topic in section Industrially Important Materials of Engineering Chemistry II

Answer 1

Right option is (b) 5

To explain I would say: Richert-Meissl number is defined as the volume of 0.1M KOH solution required for the neutralisation of 5grams of fat or oil. It is an indicator of how much volatile fatty acid can be extracted from fat through saponification.