Which one of the following statements about flashpoints is correct?
A - VCE - SSCE Chemistry - Question 13 - 2019 - Paper 1
Question 13
Which one of the following statements about flashpoints is correct?
A. The flashpoint of butane is lower than 25 °C.
B. As a flashpoint increases, the viscosity ... show full transcript
Worked Solution & Example Answer:Which one of the following statements about flashpoints is correct?
A - VCE - SSCE Chemistry - Question 13 - 2019 - Paper 1
Step 1
A. The flashpoint of butane is lower than 25 °C.
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Answer
The typical flashpoint of butane is around -60 °C, which is significantly lower than 25 °C. Therefore, this statement is correct.
Step 2
B. As a flashpoint increases, the viscosity decreases.
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Answer
This statement is generally incorrect. In many cases, as the flashpoint increases, the viscosity of the liquid tends to increase due to greater molecular interaction.
Step 3
C. The flashpoint of a compound is higher than its boiling point.
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Answer
This statement is incorrect. The flashpoint is defined as the lowest temperature at which vapor ignites, which is typically lower than or equal to the boiling point.
Step 4
D. The flashpoint of butane is greater than the flashpoint of butan-1-ol.
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Answer
This statement is incorrect. Butan-1-ol has a higher flashpoint than butane, making this statement false.
