Chemistry - PERIODIC TABLE Question with Solution | TestHub
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 INCORRECT combination considering List-I and List-II?
Options:
Answer:
Solution:
Based on the trends shown in the table, here is the solution for identifying the incorrect combination:
III S is correct: Sulfate solubility decreases down Group 2 due to a faster decrease in hydration energy compared to lattice energy.
II T is correct: Basic character of Group 2 oxides increases down the group as the electropositive nature of the metal increases.
IV R is correct: Lattice energy decreases as ionic size increases (Be²⁺ to Sr²⁺), which matches the decreasing trend shown.
IV P is INCORRECT (Option D): Thermal stability of oxalates increases down the group (Be < Mg < Ca < Sr) because the polarizing power of the cation decreases; however, row (IV) shows a decreasing trend.