Ncert Exercises & Solutions

Match the elements given in Column I with the properties mentioned in Column II.

Column I	Column II
A. Li	1. Insoluble sulphate
B. Ca	2. Strongest monoacidic base
C. Na	3. Most negative $E^{Θ}$ value among alkali metals
D. Ba	4. Insoluble oxalate

Codes

Hint: Ca form insoluble oxalate

A. Li is the most negative

E^{Θ}

among alkali metals [Due to very high hydration energy the resulting

E^{⊝}

is most negative].

B. Na form strongest monoacidic base, that is, NaOH [Alkalies are more acidic than alkaline earth metals. LiOH has covalent character].

C. Ca form insoluble oxalate, that is (CaC₂O₄).

D. Ba forms Insoluble sulfate.