Biodiesel and petrodiesel
A - VCE - SSCE Chemistry - Question 2 - 2021 - Paper 1
Question 2
Biodiesel and petrodiesel
A. have different viscosities.
B. have the same environmental impact.
C. contain molecules with no polar groups.
D. will flow easily throu... show full transcript
Worked Solution & Example Answer:Biodiesel and petrodiesel
A - VCE - SSCE Chemistry - Question 2 - 2021 - Paper 1
Step 1
A. have different viscosities.
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Answer
Biodiesel and petrodiesel do indeed have different viscosities. Viscosity is a measure of a fluid's resistance to flow. Generally, biodiesel can have a higher viscosity than petrodiesel, particularly at lower temperatures, which affects its ability to flow through fuel systems.
Step 2
B. have the same environmental impact.
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Answer
This statement is incorrect. Biodiesel is considered to be more environmentally friendly than petrodiesel because it is derived from renewable resources and typically produces fewer harmful emissions when burned.
Step 3
C. contain molecules with no polar groups.
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Answer
Biodiesel does contain molecules that have polar groups due to its composition of triglycerides, which are esters derived from fatty acids. Therefore, this statement is false.
Step 4
D. will flow easily through fuel lines in very cold climate conditions.
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Answer
This is generally not true. In cold conditions, biodiesel can gel or solidify, leading to flow issues in fuel lines. Petrodiesel, on the other hand, tends to perform better in low temperatures.
