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WorksheetsChemical tests - IGCSE Chemistry
Total questions: 24
Worksheet time: 13mins
What colour does the flame go if sodium was heated?
Blue
Brown
Green
Yellow
What colour does the flame go if potassium was heated?
Lilac
Red
Blue
Orange
What colour flame will show if calcium is burned?
Pink
Orange-red
Green
Yellow
What colour will the flame go if lithium is heated?
Blue
Crimson
Yellow
Green
What colour will the flame go if copper is heated?
Lilac
Yellow
Green
Red
The diagram shows a chemical reaction that produces a gas. The gas bleaches damp litmus paper.
What is the gas?
ammonia
chlorine
hydrogen
oxygen
Which of the following is a chemical test for the gas oxygen?
relights a glowing splint
bleaches damp litmus paper white
pops with a lit splint
turns limewater cloudy
Which of the following is a chemical test for the gas hydrogen?
relights a glowing splint
turns limewater cloudy
bleaches damp litmus paper white
pops with lit splint
A gas turns damp red litmus paper blue. The gas is
sulfur dioxide, SO2
oxygen, O2
ammonia, NH3
carbon dioxide, CO2
Which gas is formed when a metal reacts with an acid?
oxygen, O2
chlorine, Cl2
hydrogen, H2
carbon dioxide, CO2
Cations are ions with what kind of charge?
positive
negative
neutral
What is initially observed when sodium hydroxide is added in excess to a solution of Fe2+ ions?
Green precipitate
Brown precipitate
Blue precipitate
White precipitate
Dilute sodium hydroxide can be added to an unknown solution to indicate the presence of....
Iron(II)
Iron(III)
Copper
All of them
Which ion can be detected in solution by adding dilute sodium hydroxide and then warming, before testing the gas given off with damp red litmus paper? A blue colour is a positive result.
Ammonium
Chloride
Sulfate
Carbonate
Many ions can be detected in solution by adding another solution and observing the colour of the solid formed. What term is given to a solid formed in a reaction between two solutions?
Filtrate
Precipitate
Residue
Solution
Chlorine gas.......
is acidic
will turn damp blue litmus red then bleach it white
is alkaline
will turn damp red litmus blue
Ammonia gas.......
is acidic
will turn damp blue litmus red then bleach it white
is alkaline
will turn damp red litmus blue
When carbon dioxide is bubbled through limewater a positive result could be described as.....
colourless to milky
colourless to cloudy
a white precipitate forms
the solution goes clear
A positive test for the presence of water shows what colour change for anhydrous copper sulphate
white to blue
blue to white
pink to blue
blue to pink
A green precipitate formed when sodium hydroxide is added to an unknown solution indicates the presence of.....
Iron(III)
Calcium
Copper
Iron(II)
Which metal produces a brick red flame?
Barium
Calcium
Silver
Lead
What is the colour of the solid hydroxide formed when testing for copper(II) ions?
Blue
Green
Orange
Brown
What do you do if you spill a chemical?
Tell the teacher
Clean it up before anyone notices
Lick it up
Wipe it up with your shirt
How can you tell if you have aluminium ions (Al3+) when you add sodium hydroxide and not zinc ions (Zn2+)?
Get a white precipitate.
Get a white precipitate that dissolves in excess sodium hydroxide
Get a white precipitate that does not dissolve in an ammonia solution
Get a white precipitate that does dissolve in an ammonia solution
