1.

A 1% (wt/ wt) solution of KCl (I) , NaCl(II) , BaCl_(2) (III) and urea (IV) have their osmotic pressures at the same temperature in the ascending order (molar masses of NaCl , KCl , BaCl_(2) and urea are 58.5 , 74.5 , 208.4 and 60 g mol^(-1) ) assuming 100 % ionisation of the electrolytes at this temperature :

Answer»

`I LT III lt II lt IV `
`III lt I lt II lt IV `
`I lt II lt III lt IV`
`III lt IV lt I lt II`

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