Free radical reactions take place in the presence of _?
Correct answer: B. Sunlight
- A. Heat
- B. Sunlight
- C. Catalyst
- D. Oxygen
Explanation
'Ultraviolet light' is simply a source of energy and is being used to break bonds. In fact, the energies in UV are exactly right to break the bonds in chlorine molecules to produce chlorine atoms.
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About Free Radical Substitution
Free radical substitution explains how alkanes react with halogens under ultraviolet light or heat through initiation, propagation and termination steps. The mechanism involves homolytic bond fission and radical intermediates, while product formation depends on the relative stability of radicals and differs from ionic substitution.
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