Which of the following molecular species is/are having \pi_2p as HOMO (highest occupied molecular or — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Sodium sulfate (Na2SO4) is an alkali metal salt and is highly soluble in water. Step 2: For alkaline earth metal sulfates (BeSO4, MgSO4, BaSO4), solubility decreases down the group (BeSO4 > MgSO4 > BaSO4) because hydration energy decreases more rapidly than lattice energy as the cation size increases. Step 3: Thus, the correct decreasing solubility order is Na2SO4 > BeSO4 > MgSO4 > BaSO4, corresponding to option (b).