Question

Which is false with respect to group 2 compounds?
1) Solubility of hydroxides increase down the group
2) BeF2 is highly soluble in H2O
3) BeSO4, is soluble in water but BaSO4, is insoluble in H2O
4) Thermal stability of the hydroxides decrease down the group​

Answer 1

Answer:

1. True
2. True
3. True
4. False

Explanation:

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Answer 2

The answer for the following statement is as follows:

1. The hydroxides 2 group elements' solubility increase down the group. This is expected to the reduction in lattice energy of the hydroxide, so the statement is true.
2. BeF2 is soluble in water due to the development of huge hydration energy, so the given statement is true.
3. BeSO4 is soluble in water but BaSO4 is not. This is primarily due to the hydration energy reducing down the group from Be to Ba and also their lattice energy persists almost steady, given the statement is true.
4. The strength of ionic solvents reduces with a decline in lattice enthalpy. Thus the strength of alkaline earth metal hydroxides reduces with a decline in lattice enthalpy as the size of alkali earth metal cations improves down the group, so the given statement is true.