MolSynapsequestion bank

MolSynapse / Question bank / p-Block Elements: Groups 17 and 18 / Trends in halogens

JEE Main levelSingle correct optionDifficulty 2 of 3ph018

Given $E^{\circ} (F X_{2} / F X^{-}) = 2.87$ V, $E^{\circ} (Cl X_{2} / Cl X^{-}) = 1.36$ V, $E^{\circ} (Br X_{2} / Br X^{-}) = 1.09$ V and $E^{\circ} (I X_{2} / I X^{-}) = 0.54$ V, which reaction is spontaneous under standard conditions?

A $Cl X_{2} + 2 F X^{-} 2 Cl X^{-} + F X_{2}$
B $Br X_{2} + 2 I X^{-} 2 Br X^{-} + I X_{2}$
C $I X_{2} + 2 Br X^{-} 2 I X^{-} + Br X_{2}$
D $Br X_{2} + 2 Cl X^{-} 2 Br X^{-} + Cl X_{2}$

Answer: B

A halogen oxidises the halide of a halogen with lower

E^{\circ}

. For

Br X_{2}

oxidising

I X^{-}

,

E_{ce ll}^{\circ} = 1.09 - 0.54 = + 0.55

V, which is positive. The other three have negative

E_{ce ll}^{\circ}

(-0.55, -0.27 and -1.51 V).

Practice p-Block Elements: Groups 17 and 18 More on Trends in halogens

Previous questionNext question

More questions on Trends in halogens

When fluorine is passed through water, the main products are JEE Main level
Chlorine gas is passed through a hot concentrated solution of NaOH. The products containing chlorine are JEE Main level
Which statement about the reaction of halogens with hydrogen is correct? JEE Main level
Hydration enthalpy of F- is the most negative among the halide ions mainly because JEE Main level
Match the halogens (P) F2, (Q) Cl2, (R) Br2, (S) I2 with their colours: (1) violet, (2) reddish brown, (3) pale yellow, (4) greenish yellow. JEE Main level
Select the correct statement(s) about the halogens. JEE Main level