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exam specific answers (alkanes)
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Total cards: 4•Content version: v4•Public deck•Updated: 8/1/2026
Card preview (4)
#1
Front (Question)
Platinum, palladium and rhodium are metals used inside catalytic converters. A very thin layer of the metals is used on a honeycomb ceramic support. Explain why a thin layer is used in this way. (2)
Back (Answer)
• to reduce amount of metal needed • to give catalyst large SA:V ratio
#2
Front (Question)
give 1 reason why carbon dioxide absorbs infrared radiation. (1)
Back (Answer)
C=O bonds vibrate at infrared frequency
#3
Front (Question)
state what is meant by the term ‘carbon-neutral’. (1)
Back (Answer)
no net emissions of carbon dioxide to the atmosphere
#4
Front (Question)
suggest why it is beneficial for some polymers to be biodegradable. (1)
Back (Answer)
prevent build-up of waste in landfill