Give reasons in two or three sentences only for (i) Bond dissociation energy of F2 is less than that of Cl2. (ii) Sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium.

Question

Give reasons in two or three sentences only for (i) Bond dissociation energy of F2 is less than that of Cl2. (ii) Sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

(i) Due to small size and high electron density of fluorine atom, there exist a significant repulsions between fluorine atoms in

F_{2},

they have greater tendency to get apart. Hence, bond energy of

F_{2}

is less than that of

C l_{2} .

This is against to bond-length bond-energy relationship,.
(ii) Sulphur dioxide is a more powerful reducing agent in alkaline medium because nascent hydrogen is produced in the presence of moisture
i.e.

S O_{2} + 2 H_{2} O ⟶ H_{2} S O_{4} + 2 H

And alkaline solution neutralises the acid i.e.

H_{2} S O_{4}

and shift the equilibrium in the forward direction producing more nascent hydrogen. But in acidic medium the equilibrium will suppressed resulting in a lesser amount of nascent hydrogen.

Q. Give reasons in two or three sentences only for (i) Bond dissociation energy of F2​ is less than that of Cl2​. (ii) Sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium.

Q. Give reasons in two or three sentences only for
(i) Bond dissociation energy of $F_{2}$ is less than that of $C l_{2} .$
(ii) Sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium.