Science 7F Chemical Reaction
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What do you call the process when an objects changes from a solid to a iquid? | Physical Change
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| What is a reversibe change? | A reversible change is when an object can change and change back to its orignal form.
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| How do you know when a chemical reaction has occured? | It could change colour, a gas is given off, an energy change etc...
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| The iron has reacted with oxygen and water in the air and turned a new substance -----> ????? | Iron oxide.
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| When the rain is polluted with sulphuric acid and corroded the iro. What is the reactant? | Sulphuric aci and iron.
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| Iron + Sulphuric acid --> ???? | Iron sulphate.
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| What is the product in the reaction when iron reacts with sulphuric acid? | Hydrogen
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| How can we test if there is hydrogen? | We can test for hydrogen by bringing a lighted splint to the tube of hydrogen. Hydrogens bur with a squeaky pop.
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| What is dry ice? | Solid carbon dioxide.
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| How can we make dry ice? | By cooling carbon dioxide down to minus eighty degrees.
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| How can we test if that gas is carbon dioxide? | When carbon dioxide is mixed with limewater, it turns milky.
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| Magnesium + Sulphuric acid ---> ??? | Magnesium sulphate
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| What is the three words in the fire triangle? | Oxygen, fuel and heat.
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| When a substance burns, what does it reacts with? | Oxygen in the air.
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| Magnesium + oxygen ---> ???? | Magnesium oxide.
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| Iron + Hydrochloric acid ---> ??? | Iron chloride
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| Shodl we used water for electrical wires and why? | No because when you put water into electricity, you will get electricuted.
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| What is the scientific name for burning? | Combustion.
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| Any chemical that is made up of only hydrogen and oxygen is called what? | Hydrocarbon
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| What do you get when methane isn't burnt properly? | Carbon monoxide and water
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| Sodium carbonate made up of? | Sodium, carbon and oxygen
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| What is NaCO? | Sodium carbonate
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| Magnesium + nitric acid ---> ???? | Magneisum nitrate.
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Or sort by any of the columns using the down arrow next to any column heading.
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