Expression P=P= x1Pi (P is total vapour pressure) holds good for binary solution containing 

  • Option 1)

    CHCl3 and CH2Cl2

  • Option 2)

    Nacl and H2O

  • Option 3)

    MeOH and H2O

  • Option 4)

    EtOH  and CH3COCH3

 

Answers (1)
D Divya Saini

As learnt in 

Rault's Law -

The total vapour pressure of binary mixture of miscible liquids be having ideally is given by

P_{T}= P_{A}^{0}x_{A}+P_{B}^{0}x_{B}

Where x_{A}  and  x_{B} are mole fraction of A and B in liquid phase.

 

 

- wherein

P_{A}^{0}  and P_{B}^{0} are vapour pressures of pure liquids.

 

 The expression given in Raoult's law but it is only valid for liquids that do not interact.

Only NaCl and H2O fulfill that condition.


Option 1)

CHCl3 and CH2Cl2

This option is incorrect

Option 2)

Nacl and H2O

This option is correct

Option 3)

MeOH and H2O

This option is incorrect

Option 4)

EtOH  and CH3COCH3

This option is incorrect

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