Physical Chemistry

Question 1 Multiple Choice (Single Answer)

Eand E⁰values of a spontaneous cell, at equilibrium, are:

E>0E⁰>0
E=0E⁰=0
E=0E⁰>0
None of the above

Question 2 Multiple Choice (Single Answer)

In a Van der Waals real gas equation, there are two constants namely 'a' and 'b'. 'What does 'b' refer to in this equation?

Volume of 1 mole of gas molecules
Volume of 2 moles of gas molecules
Volume of 3 moles of gas molecules
Volume of 4 moles of gas molecules

Question 3 Multiple Choice (Single Answer)

The half life of a zero order reaction, A --> Products is:

directly proportional to the initial concentration
directly proportional to the initial rate constant
independent of the initial concentration
inversely proportional to the initial concentration

Question 4 Multiple Choice (Single Answer)

The Henry's law constant, for the solubility of O₂ gas in water at 298 K, is 2 atm. The mol fraction
of O₂ in air is 0.2. The number of moles of O_2, from air, dissolved in 10 moles of water at 298 K and 5 atm pressure is:

20
10
1
15

Question 5 Multiple Choice (Single Answer)

There are two isotopes of hydrogen, i.e. ¹H and ²H. The ratio of radii of their first orbits, using Bohr's Theory and ignoring the reduced mass concept, is

1 : 2
1 : 1
1 : 4
none of the above

Questions