Quiz on Molecules and Crude Oil Separation

What type of reaction is exothermic?

• Endothermic

• Combustion

• Neutralization

• Precipitation

What is produced due to incomplete combustion of fuel?

• Carbon dioxide

• Carbon monoxide

• Water vapor

• Sulfur dioxide

Why is carbon monoxide produced during incomplete combustion?

• Excess oxygen

• Insufficient oxygen

• High temperature

• Low pressure

What is the main process used to separate petrol from crude oil?

• Filtration

• Evaporation and condensing

• Distillation

• Crystallization

At what temperature is the crude oil mixture heated during fractional distillation?

• 100°C

• 250°C

• 350°C

• 450°C

What is the chemical formula for the alkane with 13 carbon atoms?

• C_13H_28

• C_13H_26

• C_13H_30

• C_13H_24

What happens to some hydrocarbons as they cool in the fractionating column?

• They evaporate

• They condense

• They ignite

• They dissolve

What is the state of some hydrocarbons at the bottom of the fractionating column?

• Solid

• Liquid

• Gas

• Plasma

What is the main purpose of fractional distillation in crude oil processing?

• To burn hydrocarbons

• To separate hydrocarbons based on boiling points

• To freeze hydrocarbons

• To dissolve hydrocarbons

What process, involving thermal decomposition, takes large hydrocarbons and turns them into smaller ones?

• Distillation

• Cracking

• Fermentation

• Combustion