Surface Chemistry & Solid State · JEE Main previous year questions

2006 2 questions

1. Q1482006 · 29 Apr 2006 · Shift 1

   Total volume of atoms present in a face-centred cubic unit cell of a metal is (r is atomic radius) :

   1. A.$20/3\pi r^3$
   2. B.$24/3\pi r^3$
   3. C.$16/3\pi r^3$
   4. D.$12/3\pi r^3$
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   Answer: C

2. Q1492006 · 29 Apr 2006 · Shift 1

   In Langmuir’s model of adsorption of a gas on a solid surface

   1. A.the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered
   2. B.the adsorption at a single site on the surface may involve multiple molecules at the same time
   3. C.the mass of gas striking a given area of surface is proportional to the pressure of the gas
   4. D.the mass of gas striking a given area of surface is independent of the pressure of the gas
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   Answer: C