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7F flashcards
7F flashcard
| Question | Answer |
|---|---|
| metal + oxygen -> | metal oxide |
| Metal + hydrochloric acid -> | hydrogen gas + metal salt |
| what makes limewater go milky | carbon dioxide |
| 3 sides of fire triangle | fuel, oxygen and heat |
| carbon dioxide has to be used on what type of fire | electrical fire |
| how to find out if there is hydrogen | if a lighted splint touches hydrogen it will give a squeaky pop |
| what happens to metal if it reacts to water and air | it corrodes |
| If dry ice melts what happens | it will go from solid straight to carbon dioxide. |
| is ice freezing a reversible or a irreversible change? | reversible change |
| what is a fire break? | a wide gap between forest to stop the forest fire spreading any farther |
| fuel + oxygen -> | carbon dioxide + water |
| what is hydrocarbon | any chemical made out of carbon and hydrogen |
| what extuingisher type should you not use on burning fuel | water |
| what extuingisher type should you use on burning fuel | foam (AFFF) |
| what type of fire should you use for foam | wood, paper, petrol, solvents, paints, plastic |
| what type of fire should you use for water | wood, paper, cloth |
| what type of fire should you use for dry powder | fires involving metals or electrical fire |
| what is physical reaction | when no new substances are formed. |
| what is chemical reaction | produces new substances |
| to make dry ice you have to cool carbon dioxide to what temperature | -80.C |
| what three factors make an explosion | a large amount of gas a lot of heat plenty of oxygen |
| is fireworks a reversible or an irreversible change | irreversible |
| what is irreversible and reversible | reversible: when something can be changed irreversible: when something can't be changed |
| what makes carbon monoxide | methane + oxygen -> |
| is carbon monoxide poisonous | yes |
| why is dry ice called dry ice | because although it is ice it does not turn into water or any liquid |
| why does the carbon in the fuel form carbon powder | when the oxygen supply is restriced |
| what is the first ever explosive | gunpowder |
| where was gunpowder invented | in china |
| mathane + what -> carbon monoxide + water | oxygen |
| TNT is used to blast rocks out of quarries True or False | True |
| what happen when a candle in placed in a beaker | it will go out |
| why does a candle go out when a it is placed in a beaker | it will use all the oxygen then go out |
| is diesel a hydrocarbon | yes |
| fuel + what -> carbon dioxide + water | oxygen |
| what + oxygen -> magnesium oxide | magnesium |
| what + hydrochloric acid -> hydrogen + iron chloride | iron |
| calsium carbonate + sulphuric acid -> | carbon dioxide + calcium sulphate |
| What is the best way to put out a fire | cover the fire |
| What is me? | ME! |
Created by:
jihovietnam
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