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Chemistry, Science
9th -
10thgrade
Hydrocarbons and Fractional Distillation
13 questions
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- 1. Multiple Choice
What is the runniness of a liquid called?
Flammability
Viscosity
Saturation
Electricity
- 2. Multiple Choice
Why are fractions with large hydrocarbon molecules more viscous than fractions with small hydrocarbon molecules?
They contain more molecules
They have a higher boiling point
They contain shorter molecules, which are easily tangled
They contain longer molecules, which are easily tangled
- 3. Multiple Choice
What is the ability for a substance to catch fire called?
Energy content
Viscosity
Flammability
Volatility
- 4. Multiple Choice
Which of the following statements is true?
The smaller the hydrocarbons in fuel, the more flammable it is.
The bigger the hydrocarbons in fuel, the more flammable it is.
The smaller the hydrocarbons in fuel, the more viscous it is.
The bigger the hydrocarbons in fuel, the lower the boiling point.
- 5. Multiple Choice
What is a fraction of crude oil?
A group of molecules with similar sizes
A group of molecules with very different sizes
One of the many compounds found in crude oil
One-eighth
- 6. Multiple Choice
What is the correct order of these fractions in terms of increasing boiling point?
LPG, petrol, kerosene, diesel, bitumen
diesel, petrol, LPG, kerosene, bitumen
LPG, bitumen, diesel, kerosene, petrol
bitumen, LPG, diesel, petrol, kerosene
- 7. Multiple Choice
Why does bitumen have a higher boiling point than kerosene?
The hydrocarbon chains are shorter in bitumen
There are fewer intermolecular forces between bitumen molecules
Bitumen is found at the bottom of the fractionating column
The hydrocarbon chains are longer in bitumen and as such there are greater intermolecular forces
- 8. Multiple Choice
Which fraction is found higher up the fractionating column?
Bitumen
Naphtha
Diesel
Kerosene
- 9. Multiple Choice
Which of the following is used as road surfacing?
Paraffin wax
Naphtha
Bitumen
Kerosene
- 10. Multiple Choice
What are most fractions of oil used for?
Making chemicals
Fuel
Making plastics
Lubricating oil
- 11. Multiple Choice
What is kerosene used for?
Fuel for aeroplanes
Road surfacing
Fuel for lorries
Making chemicals
- 12. Multiple Choice
Which family of carbon compounds is commonly found in crude oil?
Diamond
Alkanes
Coal
Graphite
- 13. Multiple Choice
As chain length increases...
The strength of the intermolecular forces and boiling point decreases.
The strength of the intermolecular forces remains the same.
The strength of the intermolecular forces decreases while the boiling point increases.
The strength of the intermolecular forces and boiling point increases.
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