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JEE Main201910 Apr 2019Evening ShiftChemistryStates of MatterActual

Points I , I I and I I I in the following plot respectively correspond to ( V m p : most probable velocity)

Options

  1. AV m p of N 2 300   K ; V m p of H 2 300   K ;   V m p of O 2 400   K ;
  2. BV m p of H 2 300 K ; V m p of N 2 300 K ; V m p of O 2 400 K ;
  3. CV m p of N 2 300 K ; V m p of O 2 400 K ; V m p of H 2 300 K ;
  4. DV m p of O 2 400 K ; V m p of N 2 300 K ; V m p of H 2 300 K ;

Correct answer

C. V m p of N 2 300 K ; V m p of O 2 400 K ; V m p of H 2 300 K ;

Step-by-step solution

V mp = 2 R T M   ∝ T M For N 2 at 300   K ,   V mp ∝ T M   ∝ 300 28 = 3.2 For O 2 at 300   K , V mp ∝ T M   ∝ 400 32 = 3.53 For H 2 at 300   K ,   V mp ∝ T M   ∝ 300 2 = 12.24 V mp of N 2 < U m p of O 2 < U m p of H 2

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