Answer: Tertiary radical.
- A Methyl radical
- B Primary radical
- C Secondary radical
- D Tertiary radical
Correct answer: D. Tertiary radical
Explanation: Tertiary radicals are stabilised by hyperconjugation from surrounding alkyl groups.
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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