Science Junior Cert
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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| 78% of what gas is found in air | Nitrogen
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| 21% of what gas is found in air | Oxygen
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| The components of air can be _____________ easily | Separated
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| The ____________________ of air varies | Composition
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| In the experiment to show the amount of oxygen in air, when you pass oxygen over heated copper, what is formed | Copper oxide
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| What do you call the paper used to test for water | Cobalt chloride paper
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| What colour does the cobalt chloride paper turn if water is present | Blue to pink
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| What happens to limewater when carbon dioxide is present | Turns milky
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| What do you call a substance which can change the speed of a chemical reaction | Catalyst
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| The chemical formula for hydrogen peroxide is what | H2O2
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| The chemical formula for manganese dioxide is what | MnO2
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| Oxygen is a colourless, odourless and __________?gas | Tasteless
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| Oxygen is slightly ___________ than air | Heavier
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| is oxygen acidic, basic or neutral gas | Neutral
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| What happens when you put a glowing splint in oxygen | Relights
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| What is formed when magnesium is burned in oxygen | Magnesium oxide
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| The chemical formula for calcium carbonate is | CaCO3
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| The chemical formula for Hydrochloric acid is | HCl
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| The chemical formula for calcium chloride is | CaCl2
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| Calcium carbonate is more commonly known as what? | Marble chips
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| Dilute hydrochloric acid is added to calcium carbonate to make what gas? | Carbon dioxide
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| What is added to manganese dioxide to make oxygen gas | Hydrogen peroxide
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| Carbon dioxide is odourless, tasteless and what? | Colourless
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| Is carbon dioxide acidic, basic or neutral | Acidic
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| Does carbon dioxide support combustion | No
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| Is carbon dioxide less dense or more dense than air | More dense
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| Carbon dioxide dissolves in water to form what acid | Carbonic acid
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| Name two uses of oxygen | Breathing , burning
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| Name two uses of carbon dioxide | Photosynthesis, fizzy drinks
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