limitation of concept of oxidation number
Though the concept of oxidation number is widely used and at the same time is very helpful in redox chemistry, yet it suffers from certain limitations.
The limitations of the concept of oxidation number are listed down as follows.
SiCl4 + LiAlH4 → SiH4 + LiCl + AlCl3
As per the classical approach, silicon is reduced and both lithium and aluminium are getting oxidised. However, according to the concept of oxidation number, none of the species is undergoing any change in oxidation number.
CH3NCO + H2O → CH3NH2 + CO2
To overcome these limitations, a broader concept of redox processes in terms of changes in electron density has been proposed.
You will read this in your higher grades.
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