Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryElectrochemistry1 Mark
Question
Corrosion is $a/ an:$
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Answer
Hint$:$ Corrosion is the oxidation of metal by moist air, often unwanted.
Corrosion is an electrochemical change. A highly reactive metal $($easily oxidisable$)$ is oxidised in the anodic reaction $M^{x+}+ xe^{− }\rightarrow M.$
Highly reactive metals are more easily corroded unless they form a protective oxide layer around them on oxidation which prevents further oxidation. Noble metals like $Pt$ are not easily corroded.
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