BIOLOGY
ENZYMES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Combustion (eg strike a match, burn a candle, build a fire, or light a grill)
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Breaking down of sugars and other carbohydrates into simpler forms that a body can absorb
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Conversion of carbon dioxide and water into glucose and oxygen
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Oxidation (eg iron develops rust over time)
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Detailed explanation-1: -Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
Detailed explanation-2: -As the rust forms on the surface of the iron, it flakes off to expose more iron, which will continue to rust. Rust is clearly a substance that is different from iron. Rusting is an example of a chemical change.
Detailed explanation-3: -Three things must be present for rusting to occur: iron, oxygen, and water. Rust forms when these three elements combine and create an electrochemical reaction. iron + water + oxygen → hydrated iron(III) oxide.
Detailed explanation-4: -Iron, as well as iron alloys, rusts because of a chemical reaction known as oxidation. When iron is exposed to moisture or oxygen, oxidation occurs. During this chemical reaction, iron is converted into iron oxide. The iron oxide typically has a reddish, flaky appearance that becomes progressively worse over time.