EduNinjaThis question is about elements.
> aluminium
> carbon iron hydrogen oxygen silicon sodium sulfur
Answer the following questions about these elements.
Each element may be used once, more than once or not at all.
Name the element that can be used as a fuel.
The Periodic Table is very useful to chemists.
Refer only to elements with atomic numbers 1 to 36 in the Periodic Table provided when answering Question 1.
One element in the first 36 elements is used as the fuel in a fuel cell.
Name this element.
Write the overall chemical equation for the reaction which occurs when the element in (c)(i) reacts in a fuel cell.
Petroleum is a useful natural resource.
The diagram shows how petroleum can be separated into useful substances.
Hydrogen fuel cells can be used to power vehicles.
Write the word equation for the overall reaction that takes place in a hydrogen fuel cell.
[Total: 13]
Which statements about hydrogen fuel cells are correct?
1 Water is formed as the only waste product.
2 Both water and carbon dioxide are formed as waste products.
3 The overall reaction is .
4 The overall reaction is endothermic.
1 and 3
1 and 4
2 and 3
2 and 4
Which statement about the hydrogen fuel cell is not correct?
Chemical energy is converted into electrical energy.
Hydrogen is oxidised.
The reaction that takes place is endothermic.
Water is the only product.
Fuel cells are used as energy sources in cars.
Which row gives a fuel used in a fuel cell and the products formed?
fuel in a fuel cell
products formed
hydrogen
carbon dioxide and water
hydrogen
water only
petrol
carbon dioxide and water
petrol
water only
Which statement about fuels is correct?
Coal and ethanol are examples of non-renewable energy sources.
Hydrogen and oxygen can be reacted to produce an electric current.
Large amounts of energy are taken in by a fuel when it burns.
Radioactive isotopes are burned to produce heat.
Which row shows the waste products released from the exhaust of a vehicle powered using a hydrogen-oxygen fuel cell?
carbon dioxide
oxides of nitrogen
water
x
x
x
x
x
Hydrogen-oxygen fuel cells and gasoline are each used to power cars.
Which statement describes an advantage of using hydrogen-oxygen fuel cells in cars in comparison with gasoline engines?
Hydrogen is a non-renewable resource.
Hydrogen is produced during the fractional distillation of petroleum.
Hydrogen-oxygen fuel cells do not release carbon dioxide.
Hydrogen-oxygen fuel cells need electricity to work.
Which statement about fuels is correct?
A Heat energy can only be produced by burning fuels.
B Hydrogen is used as a fuel although it is difficult to store.
C Methane is a good fuel because it produces only water when burned.
D Uranium is burned in air to produce energy.