Question:
Given below are two statements:
Statement-I: Solubility of alkaline earth metal hydroxides in water increases down the group.
Statement-II: Solubility of alkaline earth metal sulphates in water increases down the group.
Given below are two statements:
Statement-I: Solubility of alkaline earth metal hydroxides in water increases down the group.
Statement-II: Solubility of alkaline earth metal sulphates in water increases down the group.
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For Group 2 compounds:
Hydroxide solubility increases down the group, whereas sulphate solubility decreases down the group.
Updated On: Jun 18, 2026
- Both statements I and II are correct
- Statement I is correct, but statement II is not correct
- Statement I is not correct, but statement II is correct
- Both statements I and II are not correct
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The Correct Option is B
Solution and Explanation
Concept:
The solubility trends of Group 2 compounds depend upon the balance between lattice enthalpy and hydration enthalpy.
Step 1: Analyze Statement I.
The hydroxides of alkaline earth metals show increasing solubility down the group. \[ Mg(OH)_2 < Ca(OH)_2 < Sr(OH)_2 < Ba(OH)_2 \] Hence, \[ \boxed{\text{Statement I is correct}} \]
Step 2: Analyze Statement II.
The sulphates exhibit decreasing solubility down the group. \[ MgSO_4 > CaSO_4 > SrSO_4 > BaSO_4 \] Thus, \[ \boxed{\text{Statement II is incorrect}} \] Therefore, \[ \boxed{\text{Statement I correct, Statement II incorrect}} \]
Step 1: Analyze Statement I.
The hydroxides of alkaline earth metals show increasing solubility down the group. \[ Mg(OH)_2 < Ca(OH)_2 < Sr(OH)_2 < Ba(OH)_2 \] Hence, \[ \boxed{\text{Statement I is correct}} \]
Step 2: Analyze Statement II.
The sulphates exhibit decreasing solubility down the group. \[ MgSO_4 > CaSO_4 > SrSO_4 > BaSO_4 \] Thus, \[ \boxed{\text{Statement II is incorrect}} \] Therefore, \[ \boxed{\text{Statement I correct, Statement II incorrect}} \]
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