Chemistry - PERIODIC TABLE Question with Solution | TestHub
List - I (Radicals) | List - II (Property having increasing order down the group) |
|---|---|
(I) Perchlorates of Alkali metals | (P) Melting point |
(II) Chlorides of Alkali metals | (Q) Lattice energy |
(III) Fluorides of Alkaline earth metals | (R) Thermal stability |
(IV) Hydroxides of Alkaline earth metals | (S) Solubility in |
| (T) Covalent character |
| (U) Ionic character |
Which of the following match is CORRECT?
Options:
Answer:
Solution:
Hydroxides of Alkaline Earth Metals (IV): This group includes compounds from Be(OH)₂ to Ba(OH)₂. Their properties change systematically as you move down the group due to the increasing size of the metal cation.
Solubility (S): The solubility of these hydroxides increases down the group. This occurs because the lattice energy decreases much more rapidly than the hydration energy as the cation size increases, making it easier for the compound to dissolve.
Ionic Character (U): The ionic character increases down the group. As the metal atoms become larger, they become more electropositive and lose electrons more easily, resulting in a stronger ionic bond between the metal and the hydroxide ion.