Alkanes, Combustion, Cracking Past Paper Questions

Question 1

Both C3H8 and C4H10 can be liquefied and used as fuels for camping stoves. Suggest with a reason which of these two fuels is liquefied more easily.

Answer 1

C4H10

Higher BP

Question 2

Why does CaCO3 react with sulfur dioxide?

Answer 2

It’s a base

Question 3

Ethanethiol and ethanol have similar shapes. Why does ethanol have a higher boiling point

Answer 3

Ethanol contains hydrogen bonding

Which is stronger than IMF in ethanethiol

Question 4

State difference between structural isomers

Answer 4

Varying structural formulae

Question 5

State a use for ethene formed from cracking

Answer 5

MAKING polymers/plastics

Question 6

Pentane is a member of the alkane homologous series. One of the structural isomers of pentane is 2,2-dimethylpropane. State the type of structural isomerism this is

Answer 6

Chain isomerism

Question 7

Suggest one reason, other than cost, why calcium carbonate is used to remove sulphur dioxide during flue gas desulphurisation

Answer 7

Acid base reaction