Question

Which of the following aqueous solutions produce the same osmotic pressure ?
(i) 0.1 M NaCl solution
(ii) 0.1 M glucose solution
(iii) 0.6 g urea kin 100 mL solution
(iv) 0.1 g of a non-electrolyte solute (X) in 50 mL (molar mass of X = 200 )
Choose the correct option.
A. (i), (ii), (iii)
B. (ii), (iii), (iv)
C. (i), (ii), (iv)
D. (i), (iii), (iv)

Answer 1

Correct Answer - B
(ii) `0.1M" glocose, "pi=CRT=0.1RT`
(iii) `0.6g" urea in 100 mL solution"`
`pi=(n)/(V)RT=(w//m)/(V)RT`
`RT=(0.6//60xx1000)/(100)xxRT=0.1RT`
(iv) `1.0g" of non-electrolyte solute (X) is 50 mL solution"`
`pi=(1.0//200)/(50)xx1000RT=0.1RT`
Hence, option (ii), (iii), (iv) have same osmotic pressure.