JEE (Advanced) 2014 Paper-2 Question 36


X and Y are two volatile liquids with molar weights of $$10 g mol^{-1}$$ and $$40 g mol^{-1}$$ respectively. Two cotton plugs, one soaked in X and the other soaked in Y, are simultaneously placed at the ends of a tube of length L = 24 cm, as shown in the figure. The tube is filled with an inert gas at 1 atmosphere pressure and a temperature of 300 K. Vapours of X and Y react to form a product which is first observed at a distance d cm from the plug soaked in X. Take X and Y to have equal molecular diameters and assume ideal behaviour for the inert gas and the two vapours.

Question 36

The experimental value of d is found to be smaller than the estimate obtained using Graham’s law. This is due to

Create a FREE account and get:

  • Free JEE Advanced Previous Papers PDF
  • Take JEE Advanced paper tests


Register with


Boost your Prep!

Download App