OCR GATEWAY C1

Study the diagram of the fractionating column. 
What fractions come out at X and Y?

• X = kerosene and Y = refinery gas
• X = refinery gas and Y = light gasoline
• X = residue and Y = gas oil
• X = refinery gas and Y = gas oil

What happens when crude oil is fractional distilled?

• Different fractions are mixed together to form oil.
• Sulfur is removed from the crude oil.
• The oil is separated into fractions of different boiling ranges by heating.
• Longer chain fractions are broken down into shorter chain fractions.

What is cracking?

• Shorter chain fractions are built up into longer chain fractions.
• The petrol fraction is removed from the rest of the crude oil.
• The crude oil is separated into fractions by heating.
• Longer chain fractions are broken into shorter chain fractions.

Suggest a use within the plant, for the petroleum gases produced at the top of the column.

• They are polymerised to form petrol.
• As a fuel to heat the crude oil.
• As a fuel to run vehicles in the plant.
• They are decomposed to form hydrogen and water.

Tags

NGSS.HS-PS3-3

What are the products of cracking?

• Short chain hydrocarbons and alkenes
• Long chain hydrocarbons and alkenes
• Short chain hydrocarbons only
• Alkenes only

What is the major use for the light gasoline and naphtha fractions of crude oil?

• Petrol/motor fuel
•  Liquid petroleum gas
• Diesel fuel
• Bitumen

Which of the following, when fossil fuels are burned, is formed when there is lack of oxygen?

• carbon monoxide
• sulphur dioxide
• nitrogen dioxide
• carbon dioxide

Tags

NGSS.HS-PS1-5

A sample of gas from a car exhaust was tested with limewater and gave a white precipitate. The gas was most likely to be?

• partly burned petrol vapour
• unburned petrol vapour
• carbon monoxide
• carbon dioxide

Tags

NGSS.MS-PS1-2

Name this alkane

• Methane
• Ethane
• Propane
• Butane

Name this alkane

• Methane
• Ethane
• Propane
• Butane

Tags

NGSS.HS-PS1-1