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Chemical Reactions

Which chemical reaction is used in making bread and alcohol?
Smelting
Electrolysis
Fermentation
Combustion
What is the chemical reaction smelting used for?
Making plastics
Making metals
Burning wood
Making glass
What does the chemical reaction neutralisation do?
Makes a mixture more acidic
Makes a mixture more alkaline
Removes the mixture
Removed the acidity and alkaline from the mixture
Is the ripening of a fruit a chemical reaction?
Yes
No
Which chemical reaction occurs in iron/steel?
Rusting
Polymerisation
Ripening
Spoiling
What does fermentation do?
Makes the long molecules in plastics
Burns oxygen
Reacts acid and alkali together
Turns sugar into alcohol
How much of the world's energy is made using combustion?
60%
70%
80%
90%
Which three things are needed in combustion?
Heat
Water
Fuel
Oxygen
Common fuels are made up of chemicals called hydrocarbons.
True.
False.
When hydrogen gas burns, it produces what?
Water
Oxygen
Carbon
Zinc
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