The following solutions were prepared by dissolving 10g of glucose...

Osmotic pressure $( \pi ) = CRT$
At same temperature, $\pi ∝ C$

Solution: $( 1 )$${C}_{1} = \dfrac{10}{180} = \dfrac{10}{180} \times 4$

${C}_{1} = \dfrac{250}{1000} = \dfrac{40}{180} = \dfrac{2}{9}$

${C}_{1} = 0 . 222M$

Solution: $( 2 )$ ${C}_{2} = \dfrac{10}{\dfrac{60}{\dfrac{250}{1000}}} = \dfrac{1}{6} \times 4 = 0 . 667M$

Solution: $( 3 )$ ${C}_{3} = \dfrac{10}{342} \times \dfrac{1000}{250} = 0 . 1169M$

$∵ {C}_{2} > {C}_{1} > {C}_{3} ∴$ Hence, order: ${P}_{2} > {P}_{1} > {P}_{3}$