Petroleum and Alkanes - Key Questions AQA Chem AS

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This is the last set of flashcards of the topics in unit 1, they cover the information on hydrocarbons, cracking, distillation, petroleum...etc

I hope these cards have helped you guys

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What is petroleum?
A mixture consisting of mainly alkane hydrocarbons
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What is a hydrocarbon?
A compound containing carbon and hydrogen only
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What is the difference between a saturated and unsaturated hydrocarbon?
A saturated hydrocarbon contains no double bonds
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How does a fractional distillation column separate a sample of hydrocarbons?
The sample is heated and then according to their different boiling points they condense at different temperatures
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Which raw material are hydrocarbons obtained from?
Crude oil
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What can the two products of incomplete combustion be other than water?
Carbon and Carbon Monoxide
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How can incomplete combustion occur?
When there is an insufficient supply of oxygen present
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What are the conditions of thermal cracking?
High temperatures and high pressures
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What is the main product of thermal cracking?
Alkenes
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Catalytic cracking requires a catalyst, what is the name of this catalyst?
Zeolite
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What are the two economic reasons for cracking?
1. Creates useful products that can be sold 2. There is larger demand for shorter chain than longer chain so by selling shorter chain a higher profit is made than selling the less demanded longer chains
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What is an environmental issue of sulphur gas?
Acid rain can be caused
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Which compound acts as a base and neutralises acidic sulphur dioxide?
Cao / Slaked lime
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What are types of metal catalysts that can be fitted into a catalytic converter in a car?
Platinum, Rhodium and Palladium
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How is the surface area increased in a catalytic converter?
The metal is thinly spread over a ceramic honeycomb
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What are the three major greenhouse gases in our atmosphere?
Water vapour, methane and carbon dioxide
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How do these gases cause global warming?
Each of the gases absorb infra-red radiation and so retain heat in the Earth's atmosphere
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Other cards in this set

Card 2

Front

What is a hydrocarbon?

Back

A compound containing carbon and hydrogen only

Card 3

Front

What is the difference between a saturated and unsaturated hydrocarbon?

Back

Preview of the front of card 3

Card 4

Front

How does a fractional distillation column separate a sample of hydrocarbons?

Back

Preview of the front of card 4

Card 5

Front

Which raw material are hydrocarbons obtained from?

Back

Preview of the front of card 5
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