Question

The fundamental principle behind Karl Fischer method is based on the ____________

(a) bunsen reaction on iodine in an aqueous medium

(b) bunsen reaction between iodine and sulphuric acid in an aqueous medium

(c) bunsen reaction between iodine and carbon dioxide in an aqueous medium

(d) bunsen reaction between iodine and sulfur dioxide in an aqueous medium

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This question is from Drying topic in section Drying of Food Processing Unit Operations

Answer 1

The correct option is (d) bunsen reaction between iodine and sulfur dioxide in an aqueous medium

The explanation: The fundamental principle behind Karl Fischer method is based on the bunsen reaction between iodine and sulfur dioxide in an aqueous medium where a primary alcohol like methanol is used as the solvent, and a base such as pyridine is used as the buffering agent.