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7F-chemical reaction
Revision card on chemical reaction
| Question | Answer |
|---|---|
| What are the features of chemical reaction? | it produce a new substance like gas or enery can change |
| What are the features of physical reaction ? | it doesnt produce any new product. |
| During the reaction, what might happene to chemicals? | They may split up or decompose |
| What forms when iron reactes with oxygen and water in the air? | it will produce iron oxide |
| iron+sulphric acid---->? | Iron sulphlate+hydrogen gas |
| What happens to a limestone when the gas in the air, such as carbon dioxied dissolves to make a weak acid?? | The limestone will corrode |
| What test do we use to test hydrogen?? | Squeeky pop test |
| What test do we use to test carbon dioxide?? | Limewater test |
| When you cook, what from cooker cause chemical energy? | Heat |
| magnesium+oxygen--->?? | Magnesium oxide |
| For a fire to burn, wgat are the three things that are needed? | Fuel, Oxygen, Heat |
| Why shouldn't we add water to buring oil? | because, when water sinks through the oil, and because of the heat, it will turn into steam which spreads the oil and make the fire bigger |
| What does carbon dioxide do, when an electronic is on fire? | it cut6s off the oxygen supply |
| What does candle wax contain?? | It contains a lot of carbon joint with hydrogen |
| fuel+oxygen-->?? | carbon dioxide+water |
| methane+oxygen-->? | Cardon dioxide+water |
| methane+oxygen(ona blue flame)-->?? | carbon monoxide+water |
| How does a candle produce energy to make a fire? | to start off, it needs heat energy and carbon and hydrogen will release energy to break apart |
| What type of fire should you use with water to let the fire out? | wood, fire, cloth |
| Describe the third type of reaction | It needs energy to start off, but it wil keep greacting on it's own |
| Describe the test used for pure oxygen | you put a glowing splint inside, then it will light again |
| What chemical does Starch contain? | it contains, carbon, hydrogen and oxygen |
| how does a chemical reaction occur? | it occures when chemical join or break apart |
| When a new substance is formed, is it irreversible? | yes |
| What are the reactants? | they are chemicals that are used to react with each other |
| When does chemical reaction becomes an explosion? | when: A large amount of gas is formed, A lot of heat is released, plenty of owygen is available. |
| What is nitroglycerine? | It is a explosive chemical which is not stable |
Created by:
ji-young.b
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