MolSynapsequestion bank

MolSynapse / Question bank / Organic Reaction Mechanisms II: Electrophilic and Radical Reactions / Free radical substitution of alkanes and selectivity

NEET levelSingle correct optionDifficulty 1 of 3o2061

Which of the following is a chain termination step in the chlorination of methane?

A $Cl X_{2} h ν 2 Cl \cdot$
B $CH X_{3} \cdot + Cl X_{2} CH X_{3} Cl + Cl \cdot$
C $Cl \cdot + CH X_{4} CH X_{3} \cdot + HCl$
D $CH X_{3} \cdot + Cl \cdot CH X_{3} Cl$

Answer: D

A termination step consumes two radicals and produces no new radical. Only the combination of

CH X_{3} \cdot

with

Cl \cdot

does this. The other steps are propagation or initiation, in which a radical is regenerated or created.

Practice Organic Reaction Mechanisms II: Electrophilic and Radical Reactions More on Free radical substitution of alkanes and selectivity

Previous questionNext question

More questions on Free radical substitution of alkanes and selectivity