OCR GCSE COMBINED SCIENCE B TWENTY
FIRST CENTURY J260 04 FOUNDATION
TIER ACTUAL PAPER 2026 QUESTIONS
WITH MARKSCHEME GRADED A+
◉ What is an element? Answer: a substance that contains atoms with the
same atomic number
◉ What is a compound? Answer: A substance that contains two or more
elements chemically joined together
◉ What is a mixture? Answer: A susbstance that consists only of one
element or compound
◉ What is a pure substance? Answer: A substance that consists only of
one element or one compound
◉ Which substances have a sharp melting point and which substances
melt over a range of tempertures? Answer: A pure substance have a
sharp melting point and a mixture melts over a range of temperatures
◉ What is filtration and how does it work? Answer: It is a seperation
technique that seperates an insoluble solid from a liquid by allowing the
liquid to pass through but not the solid particles
, ◉ What is crystalisation and how does it work? Answer: It is a
seperation technique that produces solid crystals of solute from a
solution by warming the solution so that the solvent evaporates, leaving
the solute behind
◉ What is fractional distillation? Answer: It is a seperation technique
that seperates a mixture of liquids with different boiling points by
boiling off the liquids each depending on their boiling points.
◉ What is simple distillation and how does it work? Answer: It is a
seperation technique that seperates a solvent from a solution by heating
the solution to evaporate the solvent. The solvent vapour is then cooled
and condensed
◉ What is the difference between simple and fractional distillation?
Answer: Simple distillation boils off a solvent and leaves the solute
behind whereas fractional distillation is when you desperate a mixture of
liquids
◉ What is chromatography and how does it work? Answer: It is a
separation technique that separates mixtures of soluble substances by
each dissolved substance being attracted to two phases; the stationary
phase and the mobile phase.
◉ What are the four different types of seperation techniques? Answer: 1.
Filtration
2. Crystalisation
FIRST CENTURY J260 04 FOUNDATION
TIER ACTUAL PAPER 2026 QUESTIONS
WITH MARKSCHEME GRADED A+
◉ What is an element? Answer: a substance that contains atoms with the
same atomic number
◉ What is a compound? Answer: A substance that contains two or more
elements chemically joined together
◉ What is a mixture? Answer: A susbstance that consists only of one
element or compound
◉ What is a pure substance? Answer: A substance that consists only of
one element or one compound
◉ Which substances have a sharp melting point and which substances
melt over a range of tempertures? Answer: A pure substance have a
sharp melting point and a mixture melts over a range of temperatures
◉ What is filtration and how does it work? Answer: It is a seperation
technique that seperates an insoluble solid from a liquid by allowing the
liquid to pass through but not the solid particles
, ◉ What is crystalisation and how does it work? Answer: It is a
seperation technique that produces solid crystals of solute from a
solution by warming the solution so that the solvent evaporates, leaving
the solute behind
◉ What is fractional distillation? Answer: It is a seperation technique
that seperates a mixture of liquids with different boiling points by
boiling off the liquids each depending on their boiling points.
◉ What is simple distillation and how does it work? Answer: It is a
seperation technique that seperates a solvent from a solution by heating
the solution to evaporate the solvent. The solvent vapour is then cooled
and condensed
◉ What is the difference between simple and fractional distillation?
Answer: Simple distillation boils off a solvent and leaves the solute
behind whereas fractional distillation is when you desperate a mixture of
liquids
◉ What is chromatography and how does it work? Answer: It is a
separation technique that separates mixtures of soluble substances by
each dissolved substance being attracted to two phases; the stationary
phase and the mobile phase.
◉ What are the four different types of seperation techniques? Answer: 1.
Filtration
2. Crystalisation
