c) remains the same
In a substitution reaction, number of electrons remain the same.
What is a substitution reaction?
When one functional group in a chemical molecule is replaced by another functional group, the chemical reaction is known as a substitution reaction.
It is also known as single displacement reaction or single replacement reaction.
Example: Iodoethane and water are produced when hydrogen iodide and ethanol combine.
CH₃CH₂OH + HI → CH₃CH₂I + H₂O
In this reaction OH is substituted or replaced by I giving CH₃CH₂I.
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