Identify the correct statements from the following :
I. Tendency to form halide hydrates gradually increases from 
to 
down the group.
II. Tendency to form stable super oxides increases from 
to 
down the group.
III. Low solubility of 
is due to its high lattice energy.
IV. Solubility of carbonates of group-2 elements increases down the group.
Text Solution
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(II) On moving down in the group the size of the atom increases. The bigger atom can stabilise more the bigger superoxide ion effectively.
(III) Lattice energy of 
is more than the hydration energy. Hence, LiF has very low solubility.
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