159) Two containers of same volume containing 1 mol of O₂ and H₂, having V_rms of H₂ 2 times than that of O₂. If the two containers are connected, what will be the ratio of rate of diffusion of O₂ to H₂?

160) Which of the following value of R is incorrect?

161) In a vessel, CO₂ is present at a total pressure of 0.5 atm. Some graphite is added to the vessel and it is found that the equilibrium pressure is 0.8 atm, the K_p value will be:

162) A 2 litre flask containing NH₃ at atm is connected to a 3 litre flask containing HCl at 3 atm through a narrow tube. What is the final total pressure if T is constant?

163) LiNO₃ decomposes on heating producing gases and a solid residue. Of 4 mol of LiNO₃ are decomposed, then volume of gas evolved at STP is: