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Most Important Selected Qs for JEE AdvancedChemistryStates of Matter

1 ~m ^3 container is filled with vapours of 0.40 kg at 1 atm and 400 K . When 0.025 kg of H ₂ gas effuses through a pin hole, 0.1 kg of vapours effuse in the same time interval. Select the incorrect statement about the vapours from the given options

Options

  1. AMolar mass of vapour is 32 ~g ~mol ⁻¹
  2. BCompression factor (Z) 1
  3. CVapour is showing negative deviation from ideal gas
  4. DV _ m (real) V _ m (ideal)

Correct answer

C. Vapour is showing negative deviation from ideal gas

Step-by-step solution

aligned & n H₂ n_v = M_v M_ H₂ & 0.025 M_v 2 0.1 = M_v 2 & M_v=32 ~g ~mol ⁻¹ & P V=n R T & V= 400 0.0821 400 32 1 & =410.5 ~L aligned Which is far less than, the actual volume occupied by gas. So, Z>1

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