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Question
Match the elements given in Column I with the properties mentioned in Column II.
| Column I | Column II |
| (i) Li | (a) Insoluble sulphate |
| (ii) Na | (b) Strongest monoacidic base |
| (iii) Ca | (c) Most negative EΘ value among alkali metals. |
| (iv) Ba | (d) Insoluble oxalate |
| (e) 6s2 outer electronic configuration |
Solution
| Column I | Column II |
| (i) Li | (c) Most negative EΘ value among alkali metals. |
| (ii) Na | (b) Strongest monoacidic base |
| (iii) Ca | (d) Insoluble oxalate |
| (iv) Ba | (a) Insoluble sulphate |
Explanation:
(i) Li – Most negative EΘ among alkali metals ......[Due to very high hydration energy the resulting EΘ is most negative].
(ii) Na – Strongest monoacidic base ......[Alkalies are more acidic than alkaline earth metals. LiOH has covalent character]
(iii) Ca – insoluble oxalate ......[Calcium oxalate is insoluble in water.]
(iv) Ba – Insoluble sulphate ......[Hydration energy decreases as size of cation increases].
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