10. Alkanes/ Alkenes/ Alkanols

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

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Front (Question)

What are the names of the alkanes from 1C to 8C atoms in molecules?

Back (Answer)

Front (Question)

What is meant by a saturated hydrocarbon?

Back (Answer)

A hydrocarbon where all C-C bonds present are single

Front (Question)

What is a “hydrocarbon”?

Back (Answer)

A compound containing only C and H atoms

Front (Question)

What is the 3D shape of methane (CH4) ?

Back (Answer)

Tetrahedral

Front (Question)

What is shown by a “Molecular Formula” ?

Back (Answer)

The types of atom and their relative abundance in a molecule. The abundance is shown as subscript e.g H2O C3H8 NH3 CO2

Front (Question)

What is shown in a “Full Structural Formula”?

Back (Answer)

All the atoms and all the bonds connecting them in a molecule

Front (Question)

What is shown in a shortened structural formula?

Back (Answer)

Each C in the chain is shown with everything bonded to it (not other C atoms in chain) No bonds need to be shown , although C=C bonds are allowed

Front (Question)

What is the general formula of the alkanes?

Back (Answer)

Front (Question)

What are the 2 main reactions of alkanes?

Back (Answer)

• Combustion • Catalytic cracking

#10

Front (Question)

Why is catalytic cracking an important reactions for longer chain alkanes?

Back (Answer)

• To produce shorter chain, more useful alkanes • To obtain alkenes which are useful reactants to make other products

#11

Front (Question)

What are the products of alkane combustion?

Back (Answer)

CO2 and H2O

#12

Front (Question)

How do we test for the products of combustion of a hydrocarbon?

Back (Answer)

#13

Front (Question)

What is a “functional group”?

Back (Answer)

The part of a molecule which gives it its chemical (and physical) properties

#14

Front (Question)

What is the functional group in the alkenes?

Back (Answer)

The C=C bond

#15

Front (Question)

How can we obtain alkenes?

Back (Answer)

By catalytic cracking of loneger chain alkanes

#16

Front (Question)

What is the general formula of the alkenes?

Back (Answer)

Cn H2n

#17

Front (Question)

What is the general formula of the Alkanols?

Back (Answer)

Cn H2n+1 OH

#18

Front (Question)

What are the 2 ways to make ethanol?

Back (Answer)

#19

Front (Question)

What are some uses of ethanol?

Back (Answer)

#20

Front (Question)

Why is pure ethanol unable to conduct electricity?

Back (Answer)

It is a covalent molecule which doesn’t break down into ions

#21

Front (Question)

What is the functional group in Alkanols?

Back (Answer)

The hydroxyl group

#22

Front (Question)

Why are alkanols miscible with water

Back (Answer)

The hydroxyl group is polar

#23

Front (Question)

Back (Answer)

#24

Front (Question)

What are the 2 main reactions of alkenes?

Back (Answer)

• Addition (particularly with water to make alkanols) • Polymerisation (to make plastics)