In the titration of KMnO4 and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is _____.
Correct Answer: 1
Solution and Explanation
\(16H^++2MnO^-_4+5C_2O^{2-}_4→10CO_2+2Mn_{2+}+8H_2O\)
During titration of oxalic acid by KMnO4, oxalic acid converts into CO2.
∴ Change in oxidation state of carbon = 1
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Concepts Used:
Hydrocarbons - Reaction Mechanism
Hydrocarbons are organic compounds that are entirely made up of only two kinds of atoms – carbon and hydrogen. Typically, hydrocarbons are colourless gases that have very weak odours.
Mechanism of electrophilic substitution reactions:
According to experimental evidences, SE (S = substitution; E = electrophilic) reactions are supposed to proceed via the following three steps:
- Generation of the electrophile
- Formation of carbocation intermediate
- Removal of proton from the carbocation interm