203) Molar concentration of 96 gm of O₂ contained in 2 litre vessel is:

204) 1 mol of ethyl alcohol was treated with 1 mol of acetic acid at 25^oC. Two third of the acid changes into ester at equilibrium. The equilibrium constant for the reaction of hydrolysis of ester is:

205) At 250^oC, the vapour density of PCl₅ is 100. Calculate the degree of dissociation at this temperature:

206) When two reactants A and B are mixed to give products C and D, the reaction quotient Q, at the initial stages of the reaction:

207) 6 gm hydrogen reacts with 9.023 x 10²³ chlorine molecules to form HCl. If total pressure of the reaction is 800 mm, then partial pressure of HCl will be: