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WorksheetsThermal Stability of Carbonates - Year 9
Total questions: 20
Worksheet time: 16mins
What does the "thermal" in thermal decomposition mean?
sulfur
catalyst
heat
oven
What colour is copper(II)carbonate
white
blue
colourless
green
copper(II)carbonate → ___________ + carbon dioxide
copper(I) oxide
copper(II) oxide
copper oxide
copper(III) oxide
What colour is sodium hydrogen carbonate?
white
blue
green
yellow when hot
What happens when CO2 is bubbled through limewater
It changes from pink to blue
It goes pop
It goes cloudy
It gets hot
______________ (+ heat) → zinc oxide + carbon dioxide
zinc carbonate
zinc oxide
zinc dioxide
zinc hydrogen carbonate
Why does thermal decomposition need heat energy
to make magic
to break bonds
to make water
to work as a catalyst
A decomposition reaction can be represented as _____________________.
AB → A + B
A + B → AB
AB + CD → AC + BD
A + BC → B + AC
Calcium carbonate when heated decomposes to calcium oxide and carbon dioxide gas
True
False
Depends on the length of time that heat is applied
Another name for Calcium oxide is 'quick lime'
True
False
Which carbonate is the most difficult to thermally decompose?
Lead carbonate
zinc carbonate
copper carbonate
potassium carbonate
When carbon dioxide is bubbled through lime water, a white precipitate is formed.
False
True
