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  • The rate of reaction of free radical halogenation of alkanes with the halogens <img alt="\mathrm{F_2, Cl_2, Br_2 }" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%7BF_2%2C%20Cl

The rate of reaction of free radical halogenation of alkanes with the halogens \mathrm{F_2, Cl_2, Br_2 } and \mathrm{I_2 } follows the order

Option: 1

\mathrm{F_2> Cl_2> Br_2> I_2 }


Option: 2

\mathrm{F_2> Cl_2> I_2 > Br_2}


Option: 3

\mathrm{I_2> Br_2> Cl_2 > F_2}


Option: 4

\mathrm{Cl_2> F_2> Br_2 > I_2}


Answers (1)

best_answer

Rate of free radical halogenation of alkanes follows the order

\mathrm{F_2> Cl_2> Br_2> I_2 }

The reaction of alkanes with fluorine is difficult to control, that with chlorine is moderate to fast, that with bromine is slow and requires high levels of UV irradiation while the reaction with iodine is practically nonexistent and thermodynamically unfavorable.

Hence, the correct answer is Option (1)

Posted by

sudhir.kumar

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