Organic chemistry (isomerism): What type of isomerism exists between CH₃CHCl₂ and CH₂Cl–CH₂Cl (two dichloroethane isomers)? Compare the position of substituents on the same carbon skeleton. Choose the correct option.

Given structures

• CH₃–CHCl₂ (1,1-dichloroethane)
• CH₂Cl–CH₂Cl (1,2-dichloroethane)

Concept/ApproachSame carbon skeleton and same functional groups (halo), but different positions of substituents ⇒ positional isomerism.

Final AnswerPositional isomerism