1.

Volume of a colloidal particle, V_(c ) as compared to the volume of a solute particle in a true solution. V _(s) could be :

Answer»

`(V _(c ))/(V _(s)) =1 `
`(V _(c ))/(V _(s)) = 10 ^(3)`
`(V_(c ))/(V _(s))= ~~10 ^(-3)`
`(V _(c ))/(V _(s)) ~~10 ^(-3)`

Solution :For true solution, the DIAMETER range is 1 to `10Å` and for COLLOIDAL solution, diameter range is 10 to `1000Å.` Taking the lower limits,
`(V _(c))/(V _(s)) = ((4)/(3 ) pi r _(c ^(3)))/((4)/(3) pi r _(s) ^(3)) = ((r_(c))/(r _(s)))^(3)`
Putting ratio of diameters in place of `(r _(c))/(r _(s))`
Ratio of diameters `= ((10)/(1)) ^(3) = 10 ^(3)`
`therefore (V _(c))/(V _(s)) ~~ 10 ^(3)`


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