Arrange the halogens F2, Cl2, Br2, I2, in order of their increasing reactivity with alkanes.

Question

Arrange the halogens F2, Cl2, Br2, I2, in order of their increasing reactivity with alkanes. (A) I2 < Br2 < Cl2 < F2 (B) Br2 < Cl2 < F2 < I2 (C) F2 < Cl2 < Br2 < I2 (D) Br2 < I2 < Cl2 < F2

Tardigrade Admin · Accepted Answer

Rate of reaction of alkanes with halogens is F2 > Cl2 > Br2 > I2. Reactivity decreases down the group as the electronegativity of the halogen decreases down the group.

Q. Arrange the halogens $F_{2}$ , $C l_{2}$ , $B r_{2}$ , $I_{2}$ , in order of their increasing reactivity with alkanes.

$I_{2} < B r_{2} < C l_{2} < F_{2}$

$B r_{2} < C l_{2} < F_{2} < I_{2}$

$F_{2} < C l_{2} < B r_{2} < I_{2}$

$B r_{2} < I_{2} < C l_{2} < F_{2}$

Rate of reaction of alkanes with halogens is $F_{2} > C l_{2} > B r_{2} > I_{2}$ .
Reactivity decreases down the group as the electronegativity of the halogen decreases down the group.

Q. Arrange the halogens F2​, Cl2​, Br2​, I2​, in order of their increasing reactivity with alkanes.

I2​<Br2​<Cl2​<F2​

Br2​<Cl2​<F2​<I2​

F2​<Cl2​<Br2​<I2​

Br2​<I2​<Cl2​<F2​