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Hydration energy of Cl− is very less than H+, hence it doesn’t form Cl−(aq) ion.

1. (a) Cl− doesn’t form Cl−(aq)
2. (b) Cl− forms Cl−(aq)
3. (c) Cl− forms Cl−(aq) with high energy
4. (d) Cl− doesn’t form Cl−(aq) with low energy

Correct answer: (b) Cl− forms Cl−(aq)

Solution

Cl− forms Cl−(aq) because it is solvated by water molecules due to ion-dipole interactions, even though its hydration energy is less than that of H+.

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