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WorksheetsYear 8 Chemical Reaction Revision Quiz
Total questions: 26
Worksheet time: 19mins
If a lit splint is held in a test tube and it blows out what gas is present?
Oxygen Gas
Carbon Dioxide Gas
Hydrogen Gas
Water Vapour
If a glowing splint is held in a test tube and it lights, what gas is present?
Oxygen Gas
Carbon Dioxide Gas
Hydrogen Gas
Water Vapour
If a lit splint is held in a test tube and a pop sound is created, what gas is present?
Oxygen Gas
Carbon Dioxide Gas
Hydrogen Gas
Water Vapour
When this gas is bubbled through limewater and the limewater turns milky, what gas is present?
Oxygen Gas
Carbon Dioxide Gas
Hydrogen Gas
Water Vapour
Looking at this chemical reaction equation a colourless gas is formed. What is the colourless gas?
Mg + 2HCl ==> MgCl2 + colourless gas
Oxygen
Hydrogen
Carbon Dioxide
look at the following equation. What are the reactants?
HCl + NaOH ==> NaCl + H2O
H2O + HCl
HCl + NaOH
HCl + NaOH
HCl + NaCl
Magnesium and Oxygen is an example of what type of reaction?
Displacement Reaction
Combustion Reaction
Decomposition Reaction
Precipitation Reaction
Magnesium and Hydrochloric Acid is an example of what type of reaction?
Displacement Reaction
Combustion Reaction
Decomposition Reaction
Precipitation Reaction
Hydrochloric Acid and Sodium Hydroxide is an example of what type of reaction?
Displacement Reaction
Combustion Reaction
Decomposition Reaction
Neutralisation Reaction
Catalase and Hydrogen Peroxide is an example of what type of reaction?
Displacement Reaction
Combustion Reaction
Decomposition Reaction
Neutralisation Reaction
A chemical that can speed up a chemical reaction is called a
Catalyst
Precipitate
Molecule
Reactant
What is produced when we chemically combine iron and sulfur. Choose any that is correct.
A solid is produced
A liquid is produced
A new compound is produced
Iron Sulfide is produced
What is the product when magnesum burns in oxygen
Magnesium
Oxide
Magnesium Oxide
Oxygen and Magnesium
Which of the following are examples of Chemical Properties?
Flammability
Readioacivity
Malleability
Density
Melting Point
Which of the following are examples of Physical Properties
Density
Toxicity
Ductility
Luster
pH
Which of the following are examples of molecules?
O2
CO2
H
H2O
Which of the following are examples of Compounds?
H2
NaCl
FeS
H2O
O2
True or False: A chemical reaction is an interaction which occurs between two or more than two substances to form a new substance.
True
False
True or False: Chemical reactions occur because molecules of different substance interact with other, in such a way that chemical bonds are broken and formed.
True
False
True or False: when a physical change has occurred, no new substance is formed
True
False
To increase the rate of combustion (speed up burning) we can:
Increase the amount of oxygen to the combustion site
Increase the amount of carbon dioxide to the combustion site
Add more wood
Match the following Elements to their Symbols
Calcium
Ca
Sodium
Na
Magnesium
Mg
Chloride
Cl
Iron
Fe
The chemicals that you start with before a reaction is called (a) . The Chemicals that you end up with is called (b) .
Organise these options by deciding whether they are examples of a physical change or chemical change?
Shredding paper
Melting Ice
Boiling water
Breaking a glass
Crushing a can
Freezing water
Stretching a rubber band
Tearing a piece of paper
Burning wood
Rusting iron
Exploding fireworks
Rotting fruit
Decaying leaves
Reacting vinegar with baking soda
Photosynthesis in plants
Corroding metal
Which of the following is a sign that a chemical reaction has occurred?
Change in color
Change in state
Change in temperature
All of the above
What type of reaction occurs when an acid reacts with a base to form water and a salt?
Displacement Reaction
Combustion Reaction
Decomposition Reaction
Neutralisation Reaction
