What does rusting mean?
Choose 1 answer
{"type":"multi-choice","id":"8222","dataJson":{"type":"multi-choice","slide_id":43417,"key":8222,"prompt":"\u003cp\u003eWhat does rusting mean?\u003c/p\u003e","validResponse":[8792],"use_data":false,"question_body":"","question_video_url":"","question_fileboy_image_id":"","options":[{"label":"To shield or defend something.","value":8795,"fileboyId":"c93d079a-6698-4063-b549-26fc3e071b3c"},{"label":"Giving up something for the sake of it benefiting someone or something else.","value":8794,"fileboyId":"f76b26a2-0a5d-4e25-87a2-087df3a86bae"},{"label":"Orange or red coating which occurs on iron when exposed to moisture and air.","value":8792,"fileboyId":"435c8b26-cb3a-4419-a1ba-370d9519d937"},{"label":"Known as the symbol Zn in the periodic table, a brittle metal which is silvery-greyish in appearance with the removal of oxidation.","value":8796,"fileboyId":"0e3f7535-d4aa-4113-ae07-e4338fd89ff3"},{"label":"For an object to become corroded or the process of corroding.","value":8793,"fileboyId":"e2bb7b7a-8e76-4edf-81c9-8aa1aeb02211"}],"question_data":{"body":"By the end of this lesson, you should be able to describe what's meant by the word corrosion, you should be able to describe the conditions required for rusting, and you should be able to describe how to prevent corrosion, including sacrificial protection. This is for triple chemistry students only.","video":null,"image_url":"https://www.developingexperts.com/file-cdn/images/get/7ca94890-0dad-4ad1-afc4-ccdfb7706198?transform=resize:800x600;format:webp;quality:80"},"limitChoices":{"min":1,"max":1}}}
What does corrosion mean?
Choose 1 answer
{"type":"multi-choice","id":"8223","dataJson":{"type":"multi-choice","slide_id":43418,"key":8223,"prompt":"\u003cp\u003eWhat does corrosion mean?\u003c/p\u003e","validResponse":[8793],"use_data":false,"question_body":"","question_video_url":"","question_fileboy_image_id":"","options":[{"label":"Giving up something for the sake of it benefiting someone or something else.","value":8794,"fileboyId":"f76b26a2-0a5d-4e25-87a2-087df3a86bae"},{"label":"For an object to become corroded or the process of corroding.","value":8793,"fileboyId":"e2bb7b7a-8e76-4edf-81c9-8aa1aeb02211"},{"label":"Orange or red coating which occurs on iron when exposed to moisture and air.","value":8792,"fileboyId":"435c8b26-cb3a-4419-a1ba-370d9519d937"},{"label":"Known as the symbol Zn in the periodic table, a brittle metal which is silvery-greyish in appearance with the removal of oxidation.","value":8796,"fileboyId":"0e3f7535-d4aa-4113-ae07-e4338fd89ff3"},{"label":"To shield or defend something.","value":8795,"fileboyId":"c93d079a-6698-4063-b549-26fc3e071b3c"}],"question_data":{"body":"Here are three different materials, you can see that the materials are corroded. We're going to start by looking at the definition of corrosion. Corrosion is the destruction of materials by chemical reactions with substances in the environment. ","video":null,"image_url":"https://www.developingexperts.com/file-cdn/images/get/f3f747b5-be29-4a14-a103-ec72e1f58328?transform=resize:800x600;format:webp;quality:80"},"limitChoices":{"min":1,"max":1}}}
What is zinc?
Choose 1 answer
{"type":"multi-choice","id":"8226","dataJson":{"type":"multi-choice","slide_id":43426,"key":8226,"prompt":"\u003cp\u003eWhat is zinc?\u003c/p\u003e","validResponse":[8796],"use_data":false,"question_body":"","question_video_url":"","question_fileboy_image_id":"","options":[{"label":"To shield or defend something.","value":8795,"fileboyId":"c93d079a-6698-4063-b549-26fc3e071b3c"},{"label":"Known as the symbol Zn in the periodic table, a brittle metal which is silvery-greyish in appearance with the removal of oxidation.","value":8796,"fileboyId":"0e3f7535-d4aa-4113-ae07-e4338fd89ff3"},{"label":"Orange or red coating which occurs on iron when exposed to moisture and air.","value":8792,"fileboyId":"435c8b26-cb3a-4419-a1ba-370d9519d937"},{"label":"Giving up something for the sake of it benefiting someone or something else.","value":8794,"fileboyId":"f76b26a2-0a5d-4e25-87a2-087df3a86bae"},{"label":"For an object to become corroded or the process of corroding.","value":8793,"fileboyId":"e2bb7b7a-8e76-4edf-81c9-8aa1aeb02211"}],"question_data":{"body":"There is one final way to prevent corrosion. This shows iron nails that have been coated in a layer of zinc. Coating a metal with zinc is called galvanizing, so these are galvanized nails. Firstly, the layer of zinc acts as a barrier against air and water; this prevents the iron from corroding. ","video":null,"image_url":"https://www.developingexperts.com/file-cdn/images/get/b01edb59-9c8d-4bf0-abc2-00d723518482?transform=resize:800x600;format:webp;quality:80"},"limitChoices":{"min":1,"max":1}}}
What does sacrificial mean?
Choose 1 answer
{"type":"multi-choice","id":"8224","dataJson":{"type":"multi-choice","slide_id":43427,"key":8224,"prompt":"\u003cp\u003eWhat does sacrificial mean?\u003c/p\u003e","validResponse":[8794],"use_data":false,"question_body":"","question_video_url":"","question_fileboy_image_id":"","options":[{"label":"Known as the symbol Zn in the periodic table, a brittle metal which is silvery-greyish in appearance with the removal of oxidation.","value":8796,"fileboyId":"0e3f7535-d4aa-4113-ae07-e4338fd89ff3"},{"label":"To shield or defend something.","value":8795,"fileboyId":"c93d079a-6698-4063-b549-26fc3e071b3c"},{"label":"For an object to become corroded or the process of corroding.","value":8793,"fileboyId":"e2bb7b7a-8e76-4edf-81c9-8aa1aeb02211"},{"label":"Giving up something for the sake of it benefiting someone or something else.","value":8794,"fileboyId":"f76b26a2-0a5d-4e25-87a2-087df3a86bae"},{"label":"Orange or red coating which occurs on iron when exposed to moisture and air.","value":8792,"fileboyId":"435c8b26-cb3a-4419-a1ba-370d9519d937"}],"question_data":{"body":"However, if the zinc gets scratched, then it still prevents corrosion and that's because zinc is more reactive than iron. This means that the zinc corrodes instead of the iron. Using a more reactive metal like this is called sacrificial protection. You'll be expected to use that term in your exam. ","video":null,"image_url":"https://www.developingexperts.com/file-cdn/images/get/c0d1edc6-68d3-4c92-8541-be15b249d941?transform=resize:800x600;format:webp;quality:80"},"limitChoices":{"min":1,"max":1}}}
What does protection mean?
Choose 1 answer
{"type":"multi-choice","id":"8225","dataJson":{"type":"multi-choice","slide_id":43425,"key":8225,"prompt":"\u003cp\u003eWhat does protection mean?\u003c/p\u003e","validResponse":[8795],"use_data":false,"question_body":"","question_video_url":"","question_fileboy_image_id":"","options":[{"label":"Known as the symbol Zn in the periodic table, a brittle metal which is silvery-greyish in appearance with the removal of oxidation.","value":8796,"fileboyId":"0e3f7535-d4aa-4113-ae07-e4338fd89ff3"},{"label":"Orange or red coating which occurs on iron when exposed to moisture and air.","value":8792,"fileboyId":"435c8b26-cb3a-4419-a1ba-370d9519d937"},{"label":"Giving up something for the sake of it benefiting someone or something else.","value":8794,"fileboyId":"f76b26a2-0a5d-4e25-87a2-087df3a86bae"},{"label":"For an object to become corroded or the process of corroding.","value":8793,"fileboyId":"e2bb7b7a-8e76-4edf-81c9-8aa1aeb02211"},{"label":"To shield or defend something.","value":8795,"fileboyId":"c93d079a-6698-4063-b549-26fc3e071b3c"}],"question_data":{"body":"To do that, we can use grease or paint, or we can coat the material with a metal and that's called electroplating. Aluminium is a very commonly used metal. The surface of aluminium naturally reacts with oxygen in the air to form a thin layer of aluminium oxide. This protects the metal underneath from any further corrosion.","video":null,"image_url":"https://www.developingexperts.com/file-cdn/images/get/482022ca-489d-40cd-8f73-7361374c9e2f?transform=resize:800x600;format:webp;quality:80"},"limitChoices":{"min":1,"max":1}}}
Look at the slide below to work out the answer.