Paper 1

Question 0

What is the general formula for alkanes

Answer 0

C(n)H(2n +1)

Question 1

Explain the term octane number

Answer 1

The tendency of a petrol based fuel to auto ignite

Question 2

Why is propane liquefied

Answer 2

To make it easier to transport

Question 3

What is the name given to molecules with different structures but the same molecular formula

Answer 3

Structural isomers

Question 4

Explain the meaning of the term structural isomer

Answer 4

Molecules with the same molecular formula but different arrangements of atoms

Question 5

What term is used as a measure of the number of ways of arrangement of molecules

Answer 5

Entropy

Question 6

Describe a chemical test to show C = C bonds are present

Answer 6

Add Bromine and the colour will change from brown to colourless

Question 7

Explain why C=C bond can show geometric isomerism

Answer 7

The C=C bond has a lack of rotation

So there can be different arrangements of atoms

Question 8

What type of covalent bond is representation by an arrow

Answer 8

Dative convalent bond