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GCSE Chemistry 1.4 Crude Oil and Fuels > End Of Unit Questions > Flashcards

Flashcards in End Of Unit Questions Deck (13)
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1
Q

Name the products when ethane burns completely

A

Water and carbon dioxide

2
Q

Give three reasons why fractions with lower boiling points are more useful as fuels

A

Burn more easily, runny liquids, burn with clean flame

3
Q

Name 2 fuels that can be made from renewable sources

A

Biodiesel and hydrogen

4
Q

Some exhaust fumes contain particulates. What are particulates and how are they produced?

A

Solid soot and unburned hydrocarbons produced by incomplete combustion

5
Q

Explain why burning some fuels produces sulphur dioxide

A

The fuel contains sulphur which oxidise to form sulphur dioxide

6
Q

Propane is used as a fuel for cookers. Explain why propane should always be burned in a plentiful supply of air

A

To prevent incomplete combustion and the release of dangerous gases

7
Q

Why are some scientists concerned about the carbon dioxide produced by burning fossil fuels?

A
  • carbon locked up in fossil fuels
  • increases carbon dioxide in atmosphere
  • carbon dioxide is a greenhouse gas
  • may cause global warming
8
Q

Write down 4 facts about pentane that you can deduce from its formula

A
  • alkane
  • saturated
  • only has single bonds
  • hydrocarbon
9
Q

Explain what happens in a fractional distillation column

A

Crude oil vapour enters column, vapour rises until boiling point of compound is reached, compound condenses and is collected as liquid

10
Q

Write a balanced symbol equation for the complete combustion of ethanol, C2H6O

A

C2H6O + 3O2 –> 2CO2 + 3H2O

11
Q

Write a balanced symbol equation of the reaction of hydrogen with oxygen

A

2H2 + O2 –> 2H2O

12
Q

Explain why scientists are interested in using hydrogen as a fuel

A
  • only product is water
  • no pollutant gases produced
  • can be made from water
13
Q

Why is crude oil separated into fractions?

A

To make useful fuels and products