Energy Transfer Form 4 IGCSE

Which statement about a fuel cell in a car is correct?

• The fuel cell produces heat, which powers the car

• The fuel cell is supplied with hydrogen directly from the air

• The only emission from a fuel cell is nitrogen gas, which is non-polluting

• The fuel cell produces electricity, which powers an electric motor

Which fuel does not produce

carbon dioxide when it burns?

• coal

• hydrogen

• methane

• petrol

Metals are welded by using heat produced by burning a gas in oxygen.

Which gas could not be used for this purpose?

• ethene

• hydrogen

• helium

• methane

The diagram shows some properties that substances may have.

• A

• B

• C

• D

A power station was designed to burn gaseous fuels only.

Which two substances could be used?

• carbon dioxide and hydrogen

• carbon dioxide and uranium-235

• hydrogen and methane

• methane and uranium-235

Which fuel does not produce air pollution when it burns?

• coal

• diesel oil

• hydrogen

• gasoline (petrol)

Power stations produce electrical energy from different fuels.

Which fuel causes least pollution to the atmosphere?

• coal

• fuel oil

• natural gas

• radioactive isotopes

Which substance does not use oxygen to produce energy?

• coal

• hydrogen

• natural gas

• uranium

Which substance could not be used as a fuel to heat water in a boiler?

• ethanol

• hydrogen

• methane

• oxygen

Statement 1 : Hydrogen is used as a fuel

Statement 2 : When hydrogen burns in the air to form water, heat energy is produced

Which is correct?

• Both statements are correct and statement 2 explains statement 1

• Both statements are correct but statement 2 does not explain statement 1

• Statement 1 is correct but statement 2 is incorrect

• Statement 2 is correct but statement 1 is incorrect