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3.2 - Alkanes

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

What are the 3 stages of the mechanism of Halogenation of Alkanes?

Back (Answer)

|> Initiation |> Propagation |> Termination

#2
Front (Question)

Name of mechanism: Halogenation of Alkanes

Back (Answer)

Free-radical Substitution

#3
Front (Question)

Define: Propagation (free-radicals)

Back (Answer)

Formation of Free Radicals

#4
Front (Question)

What is produced from catalytic cracking?

Back (Answer)

|> Cyclic & branched Alkanes |> Aromatic Rings (e.g. Benzene)

#5
Front (Question)

Define: Initiation (free-radicals)

Back (Answer)

Formation of radicals under UV light

#6
Front (Question)

What does Thermal Cracking produce?

Back (Answer)

|> Alkanes |> High % of Alkenes

#7
Front (Question)

What are the Catalysts used in Catalytic Converters?

Back (Answer)

Rh, Pd, Pt

#8
Front (Question)

As the length of a carbon chain increases, the boiling point ____ ?

Back (Answer)

Increases

#9
Front (Question)

Why are power station chimneys coated with CaO or CaCO₃?

Back (Answer)

Remove Sulfur Dioxide from Flue Gas Form Plasterboard

#10
Front (Question)

What are the Conditions for Halogenation of Alkanes?

Back (Answer)

U.V. Light

#11
Front (Question)

Why does boiling point decrease as no. of branches increases?

Back (Answer)

|> Less points of contact |> VDWs become weaker |> Less energy to break

#12
Front (Question)

What conditions is Thermal Cracking carried out at?

Back (Answer)

v. High Temp High Pressure

#13
Front (Question)

Why are Alkanes not soluble in Water?

Back (Answer)

|> They are non-polar |> Water molecules are held together by hydrogen bonds, which are much stronger than VDWs

#14
Front (Question)

What is produced from Further Incomplete combustion of Alkanes?

Back (Answer)

solid C & H₂O

#15
Front (Question)

Define: Structural isomers

Back (Answer)

Molecules with the same molecular formula but a different structural formula

#16
Front (Question)

What are the products of Catalytic Cracking used for?

Back (Answer)

Motor Fuels

#17
Front (Question)

Why does boiling point Increase as Chain Length Increases?

Back (Answer)

|>More electrons |>Stronger temporary dipoles |>More energy needed to break

#18
Front (Question)

Define: Saturated Hydrocarbons

Back (Answer)

Only contain single C-C bonds

#19
Front (Question)

Define: Cycloalkane

Back (Answer)

|> Have general formula CnH₂n |> Named according to largest ring

#20
Front (Question)

What Inter-molecular forces attract neighbouring Alkane molecules?

Back (Answer)

weak VDWs

#21
Front (Question)

As the number of Branches in an Alkane Increases, the boiling point ____ ?

Back (Answer)

Decreases

#22
Front (Question)

What is produced from Incomplete combustion of Alkanes?

Back (Answer)

CO & H₂O

#23
Front (Question)

Are alkanes polar or non-polar?

Back (Answer)

|> Non-polar |> C & H have similar electronegativity vaues

#24
Front (Question)

Define: Hydrocarbon

Back (Answer)

Compounds that contain Carbon & Hydrogen atoms only