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WorksheetsMAGS C1.5- Combination & Decomposition
Total questions: 15
Worksheet time: 8mins
What colour is copper oxide, CuO?
Blue
Green
Black
White
Which of these is NOT a catalyst for the decomposition of hydrogen peroxide?
Potassium iodide
Magnesium oxide
Manganese dioxide
Which of these metals is NOT grey?
Iron
Copper
Magnesium
Zinc
Electron transfer occurs in ALL combination reactions
True
False
What is the name of NaHCO3?
Sodium hydrogen carbonate
Sodium carbonate
Sodium hydrocarbon
Sodium carbonate hydroxide
What colour and state is SCl2 at room temperature?
Red solid
Green solid
Red liquid
Green liquid
In what reaction do we observe a green light?
Sulfur + oxygen
Zinc + sulfur
Sulfur + chlorine
Iron + sulfur
What colour does cobalt chloride paper turn in the presence of water?
Pink
Blue
What happens to colourless limewater when potassium carbonate is heated? N.B. test tube of limewater connected via delivery tube.
Limewater turns cloudy
Limewater turns brown
Nothing
Tick ALL of the following decomposition reactions that form water as a product
Metal carbonate
Metal hydrogen carbonate
Metal hydroxide
What are the reactants in a combination reaction?
Molecules
Compounds
Elements
All of the above
What is the formula for sulfur dioxide?
SO
SO2
SO3
SO42-
What colour is copper carbonate powder?
Green
Blue
Black
White
What colour is oxygen gas?
White
Pale green
Colourless
Clear
How many reactants are there in a decomposition reaction?
1
2
3
More than 1
