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Write the name of type of given reaction.

CH3-CH2-Br + NaOH → CH3-CH2-OH + NaBr

1. Elimination reaction
2. Free radical substitution reaction
3. Nucleophilic substitution reaction
4. Electrophilic substitution reaction

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Correct Answer - Option 3 : Nucleophilic substitution reaction


  • When CH3CH2Br reacts with aqueous NaOH solution, CH3CH2OH is produced.
  • This is a nucleophilic substitution reaction. 
  • The reaction follows SN2 pathway.
  • The nucleophile OH- attacks on the nucleophilic carbon atom from the backside and bromide starts to depart from the same carbon atom. 

Nucleophilic substitution reactions-

Substitution reactions are the types of reactions where a nucleophile is the attacking reagents.

  • There are three types of substitution reactions depending on the nature of the substrate.
    • Nucleophilic substitution at saturated carbon. 
    • Nucleophilic acyl substitution
    • Nucleophilic aromatic substitution.
  • SN- Unimolecular nucleophilic substitution:
    • Depends upon the concentration of the substrate.
    • Is independent of the concentration of the nucleophile.
    • Follows first-order kinetics.
  • SN2- bimolecular nucleophilic substitution.
    • the rate depends on the concentration of both the reactant and the substrate.

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