S3 - Cracking Hydrocarbons

What is the primary purpose of cracking in the petroleum industry?

• To break down larger hydrocarbons into smaller, more useful ones

• To combine small hydrocarbons into larger ones

• To increase the boiling point of hydrocarbons

• To purify crude oil

What are the products of cracking?

• Only smaller alkanes

• Water and carbon dioxide

• Only alkenes

• Smaller alkanes and an alkene

Which type of hydrocarbon is more useful as fuels?

• Smaller hydrocarbons

• Both are equally useful

• Neither are useful

• Larger hydrocarbons

Which of these is correct for smaller hydrocarbons?

• Lower boiling points

• Variable boiling points

• Higher boiling points

• No boiling point

What is a key use of alkenes produced from cracking?

• In the manufacture of plastics

• As a food additive

• In water purification

• In pharmaceuticals

What equation is correct for the cracking of C₁₂H₂₆?

• C + H₂

• C₆H₁₂ + C₆H₁₀

• C₈H₁₈ + C₄H₈

• CH₄ + C₂H₄

Which catalyst is used in catalytic cracking?

• Platinum

• No catalyst is used

• Sulfuric acid

• Aluminium oxide

Why is there a high demand for small chain hydrocarbons?

• They are more useful as fuels

• They are less useful as fuels

• They are harder to produce

• They are only used in scientific research

What happens to the carbon atoms in the cracking process?

• They are rearranged into smaller molecules

• They are unchanged

• They are removed from the mixture

• They are converted into liquid form

Tags

NGSS.HS-PS1-2

What ensures the balance of atoms in the cracking equations?

• The reaction does not involve carbon or hydrogen

• The number of carbon and hydrogen atoms remains the same before and after the reaction

• Atoms are added during the reaction

• Atoms are removed during the reaction

Tags

NGSS.HS-PS1-7