Question

Order of reactivity of halogens in halogenation of alkanes is …………. 

(A) F₂ > Cl₂ > Br₂ > I₂ 

(B) I₂ > Br₂ > Cl₂ > F₂ 

(C) Br₂ < I₂< F₂ < Cl₂ 

(D) Cl₂ < I₂ < Br₂ < F₂

Answer 1

Correct option is: (A) \(F_2 > Cl_2 > Br_2 > I_2\)

The chemical reactions in which a hydrogen atom of an alkane is replaced by a halogen atom are known as halogenation.

RH + \(x_2 \rightarrow\) RX + HX

The reactivity of halogens is in the order of \(F_2 > Cl_2 > Br_2 > I_2\) 

Fluorine is the most reactive among halogens in halogenation reaction and iodine is the least reactive

Answer 2

(A) F₂ > Cl₂ > Br₂ > I₂