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 is known to absorb moisture from the environment, making it more hygroscopic compared to biodiesel.
Step 2
II. Biodiesel forms crystals at a higher temperature than petrodiesel.
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Answer
This statement is false. Biodiesel tends to crystallize at lower temperatures than petrodiesel due to its higher saturation levels and fatty acid composition.
Step 3
III. Biodiesel and petrodiesel are derived from plants and animals.
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This statement is partially true. While biodiesel is derived from plant oils and animal fats, petrodiesel is derived from fossil fuels which are not sourced from biological materials.
Step 4
IV. The combustion of biodiesel releases less sulfur dioxide than petrodiesel.
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This statement is true. Biodiesel combustion generally results in lower sulfur dioxide emissions as it contains little to no sulfur compared to petrodiesel.
