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- Multiple ChoicePlease save your changes before editing any questions.Another term for burning isFire triangleMagnesium oxideCombustionBustion
- Multiple ChoicePlease save your changes before editing any questions.
In this chemical reaction, which is the product/s?
Magnesium + Oxygen --> Magnesium oxide
magnesium
magnesium and oxygen
magnesium oxide
oxygen
- Multiple ChoicePlease save your changes before editing any questions.
Three things that are needed for combustion are:
oxygen, nitrogen and carbon dioxide
fuel, oxygen and carbon dioxide
fuel, heat and oxygen
fuel, heat and carbon dioxide
- Multiple ChoicePlease save your changes before editing any questions.
What does a fuel need in order to burn?
fuel
electricity
oxygen
hydrogen
- Multiple ChoicePlease save your changes before editing any questions.
magnesium + oxygen --> magnesium oxide
If you started with 5g of magnesium and 2.5g of oxygen, what mass of magnesium oxide would be produced?
5g
2.5g
7.5g
10g
- Multiple ChoicePlease save your changes before editing any questions.
Hydrocarbons are fuels containing only:
carbon and oxygen
carbon and hydrogen
carbon dioxide and hydrogen
hydrogen and nitrogen
- Multiple ChoicePlease save your changes before editing any questions.Which of the following is the product of the reaction of aluminium and oxygen?aluminium oxide.metal oxidealuminium orealuminium and oxygen
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What is the scientific term given when something burns?
a fuel
flammable
combustion
heating
- Multiple ChoicePlease save your changes before editing any questions.How are metal oxides formed?When metals react with oxide.When metals react with water.When metals react with air.When metals react with oxygen.
- Multiple ChoicePlease save your changes before editing any questions.Which of the following reactions produces calcium oxide?calcium and oxidecalcium and watercalcium and aircalcium and oxygen
- Multiple ChoicePlease save your changes before editing any questions.Which of the following defines oxidation?A chemical reaction where a substance gains oxygen.A chemical reaction where a substance loses oxygen.A chemical reaction where a substance loses a metal.A chemical reaction where a substance gains a metal.
- Multiple ChoicePlease save your changes before editing any questions.Which of the following is an example of an oxidation reaction?Ca + O2 --> CaONa2O + H2O --> NaOHFe2O3 + CO --> Fe + CO2All of the choices are oxidation reactions.
- Multiple ChoicePlease save your changes before editing any questions.The rusting of iron is an example ofa reduction reaction.an oxidation reaction.a reaction of iron with water.a reaction that dissolves iron.
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In a word equation, the starting chemicals are called...
reactants
products
ingredients
- Multiple ChoicePlease save your changes before editing any questions.
What was the chemical name given to Rust ?
Carbon
Iron Oxide
Iron Oxygen
Magnesium Oxide
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True or false: A change in state is a chemical reaction
True - something melting would be an example of a chemical reaction
False - a change in state is a physical change
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What are the reactants in rust?
iron
oxygen
dust
carrots
- Multiple ChoicePlease save your changes before editing any questions.
The combustion of hydrocarbons produces 2 things:
nitrogen and carbon dioxide
water and hydrogen
nitrogen and hydrogen
water and carbon dioxide
- Multiple ChoicePlease save your changes before editing any questions.What is essential for a combustion reaction to begin?Carbon dioxideFuelFuel, oxygen and heatWater and oxygen
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The word equation for combustion is:
fuel + oxygen --> water + ..........................................
Carbon dioxide
Limewater
Hydrogen
Nitrogen
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What two things cause iron to rust ?
Air and Oxygen
Water and Carbon dioxide
Oxygen and Water
Carbon dioxide and Air
- Multiple ChoicePlease save your changes before editing any questions.Which type of metal doesn't rust at all?steelironcopper
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In which tube will the nail go rusty?
The nail in tube A will go rusty.
The nail in tube B will go rusty.
The nail in tube C will go rusty.
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Galvanization is the process of applying a _______ coating to steel or iron.
water
salt
sunscreen
zinc
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What environmental element assists rusting?
nitrogen
oxygen
carbon
hydrogen
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Which of the following items will rust?
A plastic bottle
A gold ring
An iron bridge
A cardboard box
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Do all metals rust?
Yes
No
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The picture shows an investigation into the conditions required for rusting. What is the purpose of the calcium chloride in test tube C?
To absorb moisture
To give out carbon dioxide
To absorb oxygen
To give out oxygen
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Look at the picture. From what you see, choose which things are needed for rusting to occur.
water only
oxygen only
oil and water
water and oxygen
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Fill in the blanks;
Iron + __________ + __________ = Iron oxide
oil + water
water + carbon dixoide
oxygen + oil
water + oxygen