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🧪 Chemistry  ·  Organic Chemistry: Basic Principles and Techniques  ·  NEET & JEE

Which species contains an unpaired electron?

Answer: Free radical.

  • A Carbocation
  • B Carbanion
  • C Free radical
  • D Electrophile

Correct answer: C. Free radical

Explanation: Free radicals contain one unpaired electron.

cis isomerClHClHsame side(Cl groups together)trans isomerClHHClopposite sides(Cl groups apart)

Geometric (cis-trans) isomers of 1,2-dichloroethene differ only in the relative arrangement of groups across the rigid C=C double bond.

Concept context

General Organic Chemistry covers the rules behind all organic reactions. Covers inductive effect, resonance, hyperconjugation, types of reactions (substitution, addition, elimination), and isomerism including optical and geometric forms.

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