At 10°C, the osmotic pressure of urea solution was formed to be 500 mm. The solution is diluted 'x' times and the temperature raised to 25°C when the osmotic prssure was noticed to be 105.3mm, then 'x' is

I(before dilution)                           II(after dilution)

${\mathrm{\pi }}_1$= 500mm                                    ${\mathrm{\pi }}_2$= 105.3mm

T₁ = (10+273)K                                T₂ = (25+273)K

V₁ = 1 lit                                            V₂ = x lit

the amount of urea remains constant , Wt. and GMW of urea remain constant

x=5

the solution  is diluted by 5 times