Chemistry - CHEMICAL BONDING Question with Solution | TestHub
Answer the following by appropriately matching the lists based on the information given in the paragraph
Covalent character in ionic bond is compared with the help of Fajan's rule. According to Fajan's rule as polarising power of cation and polarisibility of anion increases covalent character in ionic bond increases on that basis we compare various properties of molecule.
List - I | List - II |
|---|---|
(I) | (P) Thermal stability |
(II) | (Q) % Ionic character |
(III) | (R) Lattice energy |
(IV) | (S) Solubility in water |
| (T) Basic nature of oxide |
| (U) Melting point |
Which of the following option has the CORRECT combination considering List-I and List-II?
Options:
Answer:
Solution:
(I) (P) Thermal stability: As cation size increases, polarizing power decreases, covalent character decreases, and thermal stability increases.
(II) (T) Basic nature of oxide: As cation size increases, ionic character increases, and basic nature of oxide increases.
(III) (S) Solubility in water: For sulfates, as cation size increases, lattice energy decreases slower than hydration energy, so solubility decreases.
(IV) (S) Solubility in water: For oxalates, as cation size increases, lattice energy decreases slower than hydration energy, so solubility decreases.
The final answer is