KCET · Chemistry · s Block Elements
The property of the alkaline earth metals that increases with their atomic number is
- A ionisation enthalpy
- B electronegativity
- C solubility of their hydroxide in water
- D solubility of their sulphate in water
Answer & Solution
Correct Answer
(C) solubility of their hydroxide in water
Step-by-step Solution
Detailed explanation
The solubility of the ionic compounds (in this case is hydroxide of alkaline earth metals ) depends on two factors, which are (i) lattice energy and (ii) hydration energy.
The lattice energy decreases more down the group as compare to the hydration energy.
Hence, solubility of alkaline earth metal increases with increase in their atomic number.
Whereas, other given properties i.e. ionisation energy, electronegativity and solubility of their sulphate in water decreases with atomic number.
The lattice energy decreases more down the group as compare to the hydration energy.
Hence, solubility of alkaline earth metal increases with increase in their atomic number.
Whereas, other given properties i.e. ionisation energy, electronegativity and solubility of their sulphate in water decreases with atomic number.
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