Key Definitions

Question 1

Hydrocarbon -

Answer 1

A compound that contains ONLY hydrogen and carbon atoms.

Question 2

Alkanes general formula -

Answer 2

CnH2n + 2

Question 3

Alkenes general formula -

Answer 3

CnH2n

Question 4

4 Features of a homologous series -

Answer 4

1- Trend in physical properties
2- Similar chemical properties
3- Same general formula
4- Each successive member of the series differs by CH2

Question 5

Saturated -

Answer 5

Contains only single bonds (alkanes)

Question 6

Unsaturated -

Answer 6

Contains double bonds (alkenes)

Question 7

Isomers -

Answer 7

Same molecular formula, different structural formula

Question 8

What is Diffusion?

Answer 8

The random mixing and moving of particles in liquids

Question 9

What is an element?

Answer 9

Substances that cannot be broken down into anything simpler because they are made up of only one small particle

Question 10

What is a mixture?

Answer 10

Contains two or more substances

Question 11

What is a molecule?

Answer 11

the building blocks of the substances around us

Question 12

What is a compound?

Answer 12

Formed when atoms join together in a chemical reaction.

Question 13

Polymer -

Answer 13

Monomers joined together

Two basic types ate addition and condensation

Question 14

Monomoer -

Answer 14

Join together to make polymers

Question 15

Functional group -

Answer 15

Group of atoms responsible for the characteristic reactions of a particular compound

Question 16

Cracking conditions -

Answer 16

• 600-700 degrees

- Aluminium/silica

Question 17

Cracking definition -

Answer 17

A process where long chain molecules are broken down into short chain molecules by the breaking of carbon bonds.

Question 18

Which homologous series does combustion undergo?

Answer 18

Alkenes

Question 19

Which homologous series does substitution undergo?

Answer 19

Alkanes

Question 20

Which homologous series does addition undergo?

Answer 20

Alkenes