Alkenes & Alkanes Flashcards
What is the general formula for alkanes?
C_nH_(2n+2)
True or False: Alkenes contain at least one carbon-carbon double bond.
True
Fill in the blank: The general formula for alkenes is C_nH_n_.
2n
What type of reaction do alkenes typically undergo?
Addition reactions
Which of the following is an example of an alkene: Ethane, Ethylene, Propane?
Ethylene
What is a key characteristic of alkanes?
They are saturated hydrocarbons.
What is the primary source of alkanes?
Fossil fuels
True or False: Alkenes are more reactive than alkanes.
True
What is the simplest alkene?
Ethene (C2H4)
Identify the type of isomerism present in alkenes.
Geometric (cis-trans) isomerism
What reaction occurs when alkenes react with hydrogen?
Hydrogenation
True or False: Alkanes can participate in addition reactions.
False
What is the main product of the combustion of alkanes?
Carbon dioxide and water
Fill in the blank: Alkenes can be converted to alcohols through a process called ___.
Hydration
Which alkane has the molecular formula C4H10?
Butane
What is the term for a hydrocarbon with only single bonds?
Saturated hydrocarbon
What type of bond is present in alkenes?
Double bond
What is the boiling point trend for alkanes as the number of carbon atoms increases?
The boiling point increases.
Which process is used to convert alkenes into polymers?
Polymerization
What is the name of the reaction where alkenes react with halogens?
Halogenation
Explain, in terms of sigma and pi bonds, why alkenes are more reactive than alkanes.
Alkanes only have sigma bonds which are very strong and unreactive, alkenes have sigma and pi bonds but pi bonds are weak & reactive - they are targeted in reactions as they break easily.
