If P0 and P are the vapour pressure of the pure solvent and solution and n1 and n2 are the moles of solute and solvent respectively in the solution then the correct relation between P and P0 is
1
P0 = P\(\left[ {\frac{{{{\rm{n}}_{\rm{1}}}}}{{{{\rm{n}}_{\rm{1}}}{\rm{ + }}{{\rm{n}}_{\rm{2}}}}}} \right]\)
2
P0 = P\(\left[ {\frac{{{{\rm{n}}_2}}}{{{{\rm{n}}_{\rm{1}}}{\rm{ + }}{{\rm{n}}_{\rm{2}}}}}} \right]\)
3
P = P0\(\left[ {\frac{{{{\rm{n}}_2}}}{{{{\rm{n}}_{\rm{1}}}{\rm{ + }}{{\rm{n}}_{\rm{2}}}}}} \right]\)
4
P = P0\(\left[ {\frac{{{{\rm{n}}_{\rm{1}}}}}{{{{\rm{n}}_{\rm{1}}}{\rm{ + }}{{\rm{n}}_{\rm{2}}}}}} \right]\)
5
Not Attempted