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- Chemical Reaction: The transformation of chemical substance into another chemical substance is known as chemical reaction.
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- Antioxidants: These are the substance that inhibits oxidation or inhibits reactions promoted by oxygen.
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- Reactant: A chemical substance that takes part in a chemical reaction and undergoes change during a reaction.
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- Catalyst: A substance that alters the rate of a chemical reaction without undergoing any change in itself during the reaction.
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- Product: A new chemical substance formed as a result of a chemical reaction.
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- Precipitate: The solid formed as a result of a precipitation reaction.
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- Reactivity series: A new series of metals ranked in order of decreasing reactivity to displace hydrogen gas from water and acid.
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- Corrosion: An irreversible damage or destruction of material in which metals are gradually eaten up by the action of air, moisture due to a chemical or electrochemical reaction on the surface of metal.
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- Oxidation: The reaction in which addition of oxygen or removal of hydrogen takes place.
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- Rancidity: It is the process of complete or incomplete oxidation or hydrolysis of fats and oils when exposed to air, light or moisture or by bacterial action resulting in unpleasant taste and odour.
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- Reduction: The chemical reaction which involves addition of hydrogen or removal of oxygen.
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- Rusting: The slow conversion of iron into hydrated ferric oxide, in the presence of moisture and air
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- Oxidising agent: A substance which helps in oxidation but itself gets reduced.
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- Rust: A reddish or yellowish-brown flaking coating of iron oxide that is formed on iron or steel by oxidation, especially in the presence of moisture.
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- Reducing agent: A substance which helps in reduction but itself gets oxidised.
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- Redox reaction: A chemical reaction in which both oxidation and reduction takes place simultaneously
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