Highest osmotic pressure is shown by a solution of

Step-by-step solution

Concentrations of ions in 0.1 M aluminium sulphate [ Al ₂ ( SO ₄ )₃ ] is aligned &=0.1 [2 ( Al ³⁺ ) ions +3 ( SO ₄²⁻ ) ions ] &=0.1[2 1+3 1]=0.1 5=0.5 M aligned Concentrations of ions in 0.1 M potassium nitrate (KCl) is =0.1 (1 . mole of K ⁺+1 mole of . Cl ⁻ ) =0.1 2=0.2 M Concentration of ions in 0.1 M magnesium chloride ( MgCl ₂ ) is =0.1 (1 . mole of Mg ²⁺+2 moles of . Cl ⁻ ) =0.1 3=0.3 M Concentration of ions in 0.1 M barium chloride ( BaCl ₂ ) is =0.1 (1 . mole of Ba ²⁺+2 moles of . Cl ⁻ ) =0.1 3=0.3 M Order o