WorksheetsCE Rev - Chem 2
Total questions: 20
Worksheet time: 12mins
In which reaction might we see an increase in mass?
thermal decomposition
displacement
oxidation
reversible reaction
What might I observe when reacting magnesium with sulfuric acid?
melting
fizzing
sublimation
dissolving
Chemical reactions all...
...are irreversible
....give out energy
....involve making / breaking bonds
...involve colour changes
What might you notice if you added water to anhydrous copper sulfate?
gets hotter
blue to white
fizzing
no reaction
The process which takes place when potassium permanganate is heated is
burning
decomposition
dissolving
neutralisation
When magnesium is added to dilute acid, the gas given off is...
air
hydrogen
nitrogen
oxygen
An oxide which has a pH value above 7 is
carbon dioxide
hydrogen
magnesium oxide
sulfur dioxide
The reaction between an acid and an alkali is best described as
displacement
neutralisation
oxidation
reduction
Washing-up liquid is a weak alkali. It could have a pH value of
3
5
9
12
When copper is heated strongly in an open dish, its mass will...
decrease
increase
increase and then decrease
stay the same
A gas which can cause acid rain is...
hydrogen
carbon dioxide
ozone
sulfur dioxide
A gas which causes rain to have a pH value of 5 is...
carbon dioxide
sulfur dioxide
ozone
nitrogen
A substance used by farmers to make their fields less acidic is...
clay
lime
manure
sand
An example of an alkali is...
lemon juice
limewater
salt water
vinegar
The pH of vinegar is about...
3
7
10
13
In the reaction: copper oxide + carbon --> copper + carbon dioxide, the copper oxide has been...
decomposed
reduced
neutralised
oxidised
A substance which forms a solution in water with a pH of about 7 is...
carbon dioxide
salt
sodium oxide
sulfur dioxide
Complete the following statement: Heating copper...
gives off oxygen
gives off carbon dioxide
makes the mass increase
does not make the mass change
Complete the following statement: Heating Potassium Permanganate...
gives off oxygen
gives off carbon dioxide
makes the mass increase
does not make the mass change
Complete the following statement: Heating Zinc Oxide...
gives off oxygen
gives off carbon dioxide
makes the mass increase
does not make the mass change
