PHS EDEXCEL CC16/17 Fuels and Atmosphere

Which of the following would have the highest melting point?

• C₃H₈
• C₄H₈
• C₅H₁₂
• C₂₂H₄₄

Tags

NGSS.HS-PS1-3

Hydrocarbons are compounds conatining

• hydrogen

• carbon

• only hydrogen and carbon

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.

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

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

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

Which is a definition of a molecule? 

• the smallest particles of matter that make up substances
• two or more elements chemically joined together and not easily separated
• two or more atoms joined together to make a bigger particle
• collection of substances which keep their own properties and easily easily separated

Tags

NGSS.MS-PS1-1

What is the correct general formula of the alkanes?

• C_nH_{2n + 2}
• C_2nH_{2n + 2}
• C_nH_2n 
• C_2nH_{n + 2}