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STD 11 - 4. Chemical bonding and molecular structure — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 4. Chemical bonding and molecular structure4 Marks
MCQ
The salt having the least solubility in water is
  • A
    $BaCl_2$
  • B
    $Ba(NO_3)_2$
  • C
    $MgSO_4$
  • ✓
    $BaSO_4$
✓

Answer

Correct option: D.
$BaSO_4$
d
The hydration enthalpy of barium sulphate is less than that of magnesium sulphate. Because of the big size of barium metal ion, the lattice enthalpy of barium sulphate increases so it is least soluble in water.

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