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NEET2019ChemistryStates of MatterActual

Moles of N ₂=0.4 and moles of O ₂=0.1 find p _ N ₂ (Partial pressure) N ₂= ?at atmospherim pressure

Options

  1. A0.2 atm
  2. B0.8 atm
  3. C0.6 atm
  4. D0.4 atm

Correct answer

B. 0.8 atm

Step-by-step solution

Key Idea According to Raoult's law, "at a given temperature, for a solution of volatile liquids, the partial vapour pressure of each component of the solution is direcently proportional to its mole fraction present in solution. According to Raoult's law, p _ A = x _ A p _ T = n _ A n _ A + n _ B p _ T where, P _ A = partial pressure p _ T = total pressure n _ A and n _ B = moles Given, ^ n N ₂=0.4, ^ n O ₂=0.1, p _ T =1 ~atm aligned P _ N ₂ & = n _ N ₂ n _ N ₂ + n _ O ₂ P _ T = 0.4 0.4+0.1 1 ~atm & = 0.4 0.5 =0.8 ~

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