Allied & ICAR Exam Bank • ALLIED_2974 MCQ • 1 Mark

Section 3: Farm Power

Sources of Power

Subtopic: Bio-fuels and their use in farm mechanization

Question Statement:

Biodiesel is chemically synthesized from vegetable oils or animal fats primarily through the chemical reaction known as:

Options:

  • (A) Transesterification using alcohol (methanol/ethanol) in the presence of an alkaline catalyst
  • (B) Hydrocracking at $500^\circ\text{C}$
  • (C) Fermentation with yeast
  • (D) Pyrolytic gasification

Answer Key:

A

Step-by-Step Solution & Explanation

Transesterification displaces glycerol with methyl esters (FAME), dropping the kinematic viscosity of vegetable oils close to that of diesel.
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