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 decr... 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 flashpoint of butane is actually around -60 °C, which is significantly lower than 25 °C. Thus, this statement is incorrect.
Step 2
B. As a flashpoint increases, the viscosity decreases.
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Answer
This statement is correct. Generally, as the flashpoint of a substance increases, its viscosity tends to decrease, as higher temperatures reduce the intermolecular forces.
Step 3
C. The flashpoint of a compound is higher than its boiling point.
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Answer
This statement is incorrect. A substance's flashpoint is typically lower than its boiling point, as the material must reach a certain temperature to ignite when vapors are mixed with air.
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. The flashpoint of butan-1-ol is higher than that of butane, making this statement false.
