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WorksheetsCockermouth School AQA GCSE Chemical Analysis
Total questions: 38
Worksheet time: 19mins
Name
Class
Date
1.
What is chemical analysis?
a)
Identifying unknown substances
b)
Analytical chemistry
c)
Identifying known substances
d)
Chemical experiments
2.
In everyday language what is a "pure" substance?
a)
Made of one compound
b)
No additives
c)
A mixture
d)
Clean
3.
In chemistry what is a "pure" substance?
a)
No additives
b)
A mixture
c)
Made of one element/compound only
d)
A formulation
4.
How can pure substances be distinguished from impure ones?
a)
Melting/boiling points
b)
Colour
c)
Smell
d)
Temperature
5.
Describe the melting and boiling points of pure substances
a)
Range of temperature
b)
Fixed
c)
Different temperature
d)
One very specific temperature
6.
Describe the melting and boiling points of impure substances
a)
Fixed
b)
Range of temperature
c)
Different temperature
d)
One very specific temperature
7.
What is a formulation?
a)
Milk
b)
A designed mixture
c)
Calculation
d)
A random mixture
8.
Give an example of a formulation
a)
Chlorine
b)
Acetone
c)
Paint
d)
Oxygen
9.
Name a process to separate the constituents of a mixture
a)
Oxidation
b)
Displacement
c)
Chromotography
d)
Combustion
10.
In paper chromatography, what is the mobile phase?
a)
Pencil line
b)
Paper
c)
Ink
d)
Solvent e.g. water
11.
How can chromatography show pure or impure substances?
a)
Impure = no dots
b)
Pure = many dots
c)
Impure = single dot
d)
Pure = single dot
12.
What value is equal to [dot distance / solvent front distance]?
a)
Rf
b)
Mr
c)
Ar
d)
Moles
13.
What does a substance's Rf value depend on?
a)
Solubility
b)
Gravity
c)
Size of compound
d)
Colour
14.
In chromatography, why is a pencil used to draw the line?
a)
It’s insoluble
b)
It's soluble
c)
It's sharper
d)
Neutral colour
15.
In chromatography, where must the solvent height be compared to the pencil line?
a)
Above
b)
Below
c)
Level with
d)
Doesn't matter
16.
A squeaky-pop when a gas is lit shows the presence of which gas?
a)
Oxygen
b)
Hydrogen
c)
Chlorine
d)
Carbon Dioxide
17.
What type of gas is able to relight a glowing splint?
a)
Oxygen
b)
Hydrogen
c)
Chlorine
d)
Carbon Dioxide
18.
A gas that turns limewater from colourless to cloudy is?
a)
Oxygen
b)
Hydrgogen
c)
Carbon Dioxide
d)
Chlorine
19.
A gas that turns damp blue litmus paper from blue to red and then white is?
a)
Oxygen
b)
Hydrogen
c)
Carbon Dioxide
d)
Chlorine
20.
What type of analysis uses the fact that metals burn with a characteristic colour
a)
Halogen test
b)
Ion analysis
c)
Flame test
d)
Silver nitrate solution
21.
What is the colour of the flame produced from a lithium containing compound?
a)
Crimson
b)
Green
c)
Lilac
d)
Golden yellow
22.
What is the colour of the flame produced from a copper containing compound?
a)
Crimson
b)
Lilac
c)
Golden Yellow
d)
Green
23.
What is the colour of the flame produced from a sodium containing compound?
a)
Crimson
b)
Lilac
c)
Green
d)
Golden yellow
24.
What is the colour of the flame produced from a potassium containing compound?
a)
Crimson
b)
Golden yellow
c)
Green
d)
Lilac
25.
What is the colour of the flame produced from a calcium containing compound?
a)
Orange-red
b)
Green
c)
Crimson
d)
Lilac
26.
Other than flame tests, how can metal ions be identified?
a)
Use of silver nitrate
b)
Use of sodium hydroxide
c)
Filtration
d)
Chromatography
27.
Which of the following ions produce white precipitates on addition of sodium hydroxide?
a)
Barium
b)
Aluminium
c)
Sodium
d)
Potassium
28.
Aluminium ions be can distinguished from calcium and magnesium because they do what in excess sodium hydroxide?
a)
Redissolve
b)
Change colour
c)
Separate
d)
Precipitate
29.
What colour precipitate forms when sodium hydroxide solution is added to copper (II) ions?
a)
Blue
b)
Green
c)
Lilac
d)
Cream
30.
What colour precipitate forms when sodium hydroxide solution is added to iron(II) ions?
a)
Green
b)
Lilac
c)
Blue
d)
Cream
31.
What colour precipitate forms when sodium hydroxide solution is added to iron(III) ions?
a)
Green
b)
Lilac
c)
Brown
d)
Cream
32.
What is present if carbon dioxide is produced when an acid is added?
a)
Hydroxide
b)
Oxide
c)
Carbonate
d)
Halide
33.
What solution is used to test for halides?
a)
Hydrochloric acid
b)
Acidified silver nitrate
c)
Barium sulfate
d)
Bromine water
34.
In order from chloride, bromide and iodide what are the precipitate colours formed when they react with silver nitrate.
a)
Green, pink, blue
b)
Yellow, brown, black
c)
White, cream, yellow
d)
Yellow, cream, white
35.
A white precipitate is formed when you add what to a solution containing sulfate ions?
a)
Barium sulfate
b)
Acidified barium sulfate
c)
Sodium hydroxide solution
d)
Acidified barium chloride
36.
Use of scientific technology to perform chemical analysis is also known as…?
a)
Instrumental analysis
b)
Microscopy
c)
Analytical chemistry
d)
Bucket chemistry
37.
Which of the following is NOTan advantages of instrumental methods?
a)
Accuracy
b)
Cost
c)
Requires little sample
d)
Very quick
38.
Which of the following is an instrumental analysis tool for identifying metal ions
a)
Flame emission spectroscopy
b)
Titration
c)
Distillation
d)
Flux capacitors
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