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WorksheetsSC2 Quiz GCSE EDEXCEL KANAYATI CHEMISTRY
Total questions: 38
Worksheet time: 29mins
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(a)
An element is.....
...made up of lots of atoms
... is more than one kind of atom
...made up of one kind of atom
.... made of one atom
Which of the following are properties of compounds? Check all that apply.
It takes a large amount of energy to separates the elements of a compound.
The proportions of the elements in a compound are always fixed
It is easy to separate the elements of a compound.
The elements/components of a compound do not retain their individual properties.
Every water molecule has two hydrogen atoms bonded to one oxygen atom. This fact supports the concept that elements in a compound are
chemically combined in a fixed proportion
chemical combined in varying proportions
physically mixed in a fixed proportion
physically mixed in varying proportions
What is the definition of a Mixture?
a combination of two or more materials that can be easily separated by some Chemical means.
a combination of two or more materials that can be easily separated by some physical means.
Describe the melting and boiling points of pure substances
Range of temperature
Fixed
Different temperature
Presence of impurities
lowers the melting point of substances and raises the boiling point
lowers the boiling point of substances and raises the melting point
Has no effect on the boiling and melting points
lowers the melting point of substances and lowers the boiling point
raises the boiling point of substances and raises the melting point
Melting point of aspirin is 138 Degrees Celsius
if the melting point is measured to be 128-134]
then the sample of Aspirin is
Pure
Impure
What is filtration?
A method used to separate a solid from a liquid that dissolves in the liquid
A separating technique used to separate a mixture of a solid and liquid where the solid does not dissolve in the liquid
I am left behind in the filter paper ]. What Am I?
Filtrate
Solution
Residue
The part of the mixture that passes through the filter paper is called the
residue
filtrate
suspension
is used to separate a solute from a solution
Filtration
Crystallization
melting
An important step of the crystallization process is making a solution which is
saturated
supersaturated
unsaturated
A soluble solute can be obtained from a solution by
Crystallization
filtration
simple distillation
condensation
Simple distillation is basically
Evaporation then condensation
Condensation then evaporation
Evaporation and filtration
Evaporation and crystallization
Distillation can be used to separate
Soluble solid from liquid
Two miscible solvents
Two immiscible solvents
Insoluble solid from liquid
A pure substance shows ------------------ spot on chromatogram
0
1
2
3
A substance is soluble if it can be dissolved.
In paper chromatography, the most soluble solute _____________________ .
does not move from the start point
stays closest to the start point
travels furthest away from the start point
can be found in the middle of the chromatogram
Which of the following mixture/s is/are separated by chromatography?
Pigments from natural colours
Colours in a dye
Colours of flowers extracts
All the above
If a substance is not soluble in the solvent, what happens to the spot placed on the start line?
a) Dot moves to the top of the paper
b) Dot does not move at all
c) Dot moves to the left or right
d) Dot moves down to the bottom of the paper
State which is the best separation method you would use to carry out the following separation:
potassium iodide from potassium iodide solution
filtration
distillation
Chromatography
crystallization
State which is the best separation method you would use to carry out the following separation:
water from potassium iodide solution
filtration
distillation
Chromatography
crystallization
State which is the best separation method you would use to carry out the following separation:
Ethanol from a mixture of ethanol and water.
filtration
distillation
Chromatography
crystallization
State which is the best separation method you would use to carry out the following separation:
Red dye from a mixture of red and blue dyes
filtration
distillation
Chromatography
crystallization
State which is the best separation method you would use to carry out the following separation:
Calcium carbonate (insoluble in water) from a mixture of calcium carbonate and water.
filtration
distillation
Chromatography
crystallization
Mixtures of colored substances can be separated by paper chromatography
a spot of the mixture to be separated in placed on the paper , but why the start line is drawn in a pencil rather than in ink?
Chromatography is carried out and the result is shown in figure
blue spot has moved 14.5cm and the solvent front had moved 15.3cm
calculate the Rf value of the substance in the blue spot giving your answers in 2 significant figures
Which is correct
Solid P is pure , Solid Q is pure
Solid P is impure , Solid Q is impure
Solid P is pure , Solid Q is impure
Solid P is impure , Solid Q is pure
103 and -3
103 and 3
97 and -3
97 and no change
Which foodstuff contains X ?
A
B
C
D
what did the mixture contain ?
Aqueous sodium chloride and unreacted solid catalyst
water and ethanol
water and oil
Aqueous sodium chloride and oil
water in - water in
water out - water in
water out - water out
water in - water out
