Chemical Reactions

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Chemical Reactions
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Q1. What gas do we need to breathe (respire)?
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A1. Oxygen
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Q2. What gas is the fuel in a Bunsen burner?
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A2. Methane
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Q3. What element in milk gives us strong teeth
and bones?
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A3. Calcium
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Q4. What is the scientific term for an upset
stomach?
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A4. Indigestion
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Q5. What do you call a chemical reaction between
a substance and oxygen that gives out heat?
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A5. Burning orCombustion
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Q6. What do you call the starting substances
before a chemical reaction takes place?
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A6. Reactants
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Q7. What do you call the substances formed in a
chemical reaction?
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A7. Products
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Q8. What element is present in all organic
compounds?
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A8. Carbon
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Q9. Name a hard form of limestone that is used to
make statues?
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A9. Marble
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Q10. Oil, gas and coal are all what??
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A10. Fossil fuels
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Q11. What environmental damage is caused by
burning fuels that contain sulphur?
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A11. Acid rain
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Q12. What do you call compounds that contain a
metal, carbon and oxygen only?
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A12. Carbonates
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Q13. What do you call a reaction that is very
difficult to take back the other way?
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A13. Irreversible
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Q14. Which metallic element is used to galvanise
steel to reduce corrosion?
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A14. Zinc
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Q15. What do you call medium sized solid lumps of
a substance?
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A15. Granules
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