MCQ
The above reaction proceeds through :

- AFree readical mechanism
- BElectrophilic substitution
- ✓Electrophilic addition
- DNucleophilic substitution

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Statement $I :$ Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement $II :$ Bohr'smodel of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below :