Consider the following statements regarding biodiesel and petrodiesel:
I - VCE - SSCE Chemistry - Question 25 - 2022 - Paper 1
Question 25
Consider the following statements regarding biodiesel and petrodiesel:
I. Petrodiesel is more hygroscopic than biodiesel.
II. Biodiesel forms crystals at a higher te... show full transcript
Worked Solution & Example Answer:Consider the following statements regarding biodiesel and petrodiesel:
I - VCE - SSCE Chemistry - Question 25 - 2022 - Paper 1
Step 1
I. Petrodiesel is more hygroscopic than biodiesel.
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Answer
This statement is true. Petrodiesel tends to absorb more moisture compared to biodiesel due to its chemical structure. This indicates higher hygroscopic properties in petrodiesel.
Step 2
II. Biodiesel forms crystals at a higher temperature than petrodiesel.
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Answer
This statement is false. Biodiesel usually has a higher cloud point, meaning it can start to crystallize at lower temperatures compared to petrodiesel.
Step 3
III. Biodiesel and petrodiesel are derived from plants and animals.
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Answer
This statement is incorrect because while biodiesel is derived from vegetable oils and animal fats, petrodiesel is derived from petroleum, which is a fossil fuel.
Step 4
IV. The combustion of biodiesel releases less sulfur dioxide than petrodiesel.
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Answer
This statement is true. Biodiesel combustion typically produces lower sulfur dioxide emissions compared to petrodiesel due to its cleaner combustion profile.
