1.

The correct order of increasing boiling of the following aqueous solutions 0.0001 M NaCl (I), 0.0001 M Urea (II), 0.001 M MgCl_(2) (III), 0.01 M NaCl (IV) is

Answer»

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

Solution :`Delta T = i xx k_(b) xx m`
`i xx m` of (0.001 M) NaCl is HIGHEST, hence its boiling point will also increase the MAXIMUM.
`0.01 M NaCl, i xx m=2xx0.01 = 0.02`
`0.001 M MhCl_(2), i xx m = 3xx0.001 = 0.003`
`0.0001 M NaCl, i xx m = 2xx 0.0001 =0.0002`
`0.0001 M` urea, `i xx m=1xx0.0001=0.0001`


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