Cracking quiz

1. What is the main reason why cracking is used in the oil industry?

a) To increase the viscosity of hydrocarbons
b) To convert alkenes into alkanes
c) To meet the high demand for smaller hydrocarbons like petrol
d) To remove impurities from crude oil

2. Which of the following is always produced in a cracking?

a) Only alkanes
c) Alcohols
c) Only alkenes
d) Alkanes and alkenes

3. What is the name of the process used to separate crude oil in various fractions before cracking takes place?

a) Simple distillation
b) Fractional distillation
c) Steam cracking
d) Thermal cracking

4. cracking requires a high and a high pressure of about 70 atmospheres.

5. What type of hydrocarbon is hexane?

a) Alkane
b) Alkene
c) Alcohol
d) Amine

6. Which of the following equation correctly shows cracking?

a) C₇H₁₆ → C₄H₁₀ + C₃H₆
b) C₄H₁₀ → C₂H₆ + C₂H₆
c) C₈H₁₈ → C₄H₁₀ + C₆H₁₄
d) C₅H₁₂ → C₃H₆ + C₂H₆

7. What is the role of a catalyst in catalytic cracking?

a) To lower the boiling point of the alkane
b) To lower the activation energy of the cracking reaction
c) To increase the pressure on the molecules being cracked
d) To slow down the cracking reaction and so reduce costs

8. Which catalyst is commonly used in catalytic cracking?

a) Platinum
b) Sulfuric acid
c) Zeolite
d) Graphite

9. What are the main products of steam cracking?

a) Alkanes
b) Alcohols
c) Branched alkanes
d) Alkenes such as ethene and propene

10. What is a common use for the alkenes produced during cracking?

a) Fuels
b) Fertiliser production
c) Polymer manufacture
d) Cleaning products