Which of the following is a NOT mechanism by which the biofuels are made? a. by reacting animal fat or vegetable oil with waterb. by fermenting sugar components of starchy cropsc. by reacting animal fat or vegetable oil with alcohold. by treating animal fat or vegetable oil with hydrogen

A. by reacting animal fat or vegetable oil with water.

D. by treating animal fat or vegetable oil with hydrogen

Explanation:

Water is insoluble in animal fat or vegetable oil so it makes a layer on the surface of oil. When animal fat or vegetable oil react with hydrogen, it produces solid oil called ghee not biofuels. Biofuel is produced when animal fat or vegetable oil react with alcohol.

Option A and D.

Explanation:

Biofuel is fuel that produced from either plants, algae or animals. There are four main types;

Ethanol that is made from corn.

Biodiesel made from animal fats and vegetable oil.

Green diesel made from algae and plant sources.

Biogas e.g methane made from animal manure and digested organic material.

Ethanol a type of biodiesel is made from fermentation of sugar components in starch crops.

Biodiesel is made from reaction between animals fats or vegetable oil with alcohol.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.