Question

Arrange the following solutions in order of increasing osmotic pressure. Assume `100%` isonisation for electrolytes: `{:(1N NaCl,1N Na_(2)SO_(4),IN Na_(3)PO_(4),,),(I,II,III,,):}`
A. I gt II gt III
B. III gt II gt I
C. II gt III gt I
D. II gt I gt II

Answer 1

Correct Answer - A
Molarities of `NaCl, NaSO_(4)` and `Na_(3)PO_(4)` are `(M)/(1), (M)/(2), (M)/(3)` respectively.
`:.` Particles furnished by
`NaCl = (M)/(1) xx 2 = 2M`
`Na_(2)SO_(4) = (M)/(2) xx 3 = (3M)/(2)`
`Na_(3)PO_(4) = (M)/(3) xx 4 = (4M)/(3)`