Question

Solvent used in polishing of brown rice during solvent extraction milling is

• A. Ether
• B. Hexane
• C. Toluene
• D. Methylene

Hint:

When you see "solvent extraction" for food oils (from soy, rice bran, etc.), the answer is almost always hexane. It's the industry standard.

Answer 1

The Correct Option is B

Step 1: Understand the process of solvent extraction milling. This process aims to remove the oil-rich bran layer from brown rice. The "polishing" in this context refers to the removal of this bran layer, and the use of a solvent indicates it's an oil extraction process.
Step 2: Identify the standard solvent for food oil extraction. Hexane is the most widely used solvent in the food industry for extracting oils from plant materials (like soybeans, canola, and rice bran). It is effective at dissolving oils, has a low boiling point for easy removal after extraction, and is relatively low in cost. The other solvents listed are not typically used for food-grade oil extraction due to reasons of safety, cost, or efficiency.