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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
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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