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Chemical Reactions
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Combining Magnesium and oxygen gives us.........................
Magnesium oxide
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Is the number of atoms before the reaction the same as the number of atoms after the reaction?
Yes
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What is a catalyst? Name the most common Catalyst.
..Mangenese di-oxide
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Combining water and carbon di-oxide is.................
Carbonic Acid.
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Explain physical and chemical change with examples.
Physical and Chemical Change
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What does Hydrogen peroxide break into?Also mention properties of hydrogen peroxide.
oxygen and water.
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How are the properties of iron oxide different from the properties of iron wool.
Colour & odour different, heavier, not a conductor of electricity and did not attract magnets.
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Explain the reaction in the glow stick with the reactants and products.
hydrogen peroxide & Luminol are the reactants.
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Explain what is produced when iron wool is burnt?
Iron Oxide
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Give an example of a slow reaction?
1) Iron Nails in Water.2) Formation of Fossil Fuels
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Give an example of a fast reaction.
1) Vinegar and Baking Soda 2) Burning of Fossil Fuels
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Is burning of iron wool a chemical reaction ? Explain
Yes, as a completely new substance iron oxide was formed.
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