Saturday, October 10, 2009

IIT-JEE-Chemistry-Final Revision Set No.64

1. 500 mL of 0.2 M aqueous solution of acetic acid is mixed with 500 mL of 0.2 M HCI at 250°C.
Calculate the degree of dissociation of acetic acid in the resulting solution and pH of the solution.

2. The density of the vapour of a substance at 1 atm pressure and 500 K is 0.36 kg m-3. The vapour effuses through a small hole at a rate of 1.33 times faster than oxygen under the same condition.
(a) Determine (i) molecular weight, (ii) molar volume, (iii) compression factor (Z) of the vapour and (iv) which forces among the gas molecules are dominating, the attractive or the repulsive?
(b) If the vapour behaves ideally at 1000 K, determine the average translational kinetic energy of a molecule.

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