Chemistry Paper 2 GCSE AQA
Foundation Questions & Answers
What is an equilibrium? - ANSWERSthe condition existing when a chemical reaction
and its reverse reaction proceed at equal rates.
What is a Catalyst? - ANSWERSspeeds up a reaction
What percentages are the gases in today's atmosphere for oxygen, Nitrogen, Vapour,
carbon dioxide? - ANSWERSOxygen- 20%, Nitrogen- 79%, Vapour- 1%, Carbon
dioxide- less than 1%
What is the equation for Photosynthesis? - ANSWERScarbon dioxide + water = Oxygen
+ glucose
Why do countries have problems to reduce carbon dioxide emissions? -
ANSWERSDisagreement between countries and the resources are underdeveloped
What is Filtration? - ANSWERSWhere you separate a mixture from filtering another
mixture
What is Electrolysis? - ANSWERSElectrolysis is a technique that uses a direct electric
current to drive an chemical reaction
What is Distillation? - ANSWERSthe action of purifying a liquid by a process of heating
and cooling.
What is Crystallisation? - ANSWERSWhen a product is made as a solution, one way to
separate it from the solvent is to make crystals. This involves evaporating the solution to
a much smaller volume and then leaving it to cool.
How is Fuel different from Crude Oil? - ANSWERSFuel is a compound and crude oil is a
mixture,
Foundation Questions & Answers
What is an equilibrium? - ANSWERSthe condition existing when a chemical reaction
and its reverse reaction proceed at equal rates.
What is a Catalyst? - ANSWERSspeeds up a reaction
What percentages are the gases in today's atmosphere for oxygen, Nitrogen, Vapour,
carbon dioxide? - ANSWERSOxygen- 20%, Nitrogen- 79%, Vapour- 1%, Carbon
dioxide- less than 1%
What is the equation for Photosynthesis? - ANSWERScarbon dioxide + water = Oxygen
+ glucose
Why do countries have problems to reduce carbon dioxide emissions? -
ANSWERSDisagreement between countries and the resources are underdeveloped
What is Filtration? - ANSWERSWhere you separate a mixture from filtering another
mixture
What is Electrolysis? - ANSWERSElectrolysis is a technique that uses a direct electric
current to drive an chemical reaction
What is Distillation? - ANSWERSthe action of purifying a liquid by a process of heating
and cooling.
What is Crystallisation? - ANSWERSWhen a product is made as a solution, one way to
separate it from the solvent is to make crystals. This involves evaporating the solution to
a much smaller volume and then leaving it to cool.
How is Fuel different from Crude Oil? - ANSWERSFuel is a compound and crude oil is a
mixture,
