Chemistry Question 73 – JEE-MAIN 2026

20 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution (A) is found to be 80.0 mm higher than the tube dipped in water. The molar mass of hemoglobin is _______ kg mol${}^{-1}$. (Nearest integer) (Given : $g=10{\text{ m s}}^{-2}$, $R=8.3{\text{ kPa dm}}^3{\text{ K}}^{-1}{\text{mol}}^{-1}$, density of solution $=1000{\text{ kg m}}^{-3}$)