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Question: If ${{P}_{o}}$and ${{P}_{s}}$are the vapour pressure of solvent and solution respectively and ${{N}_{1}}$and ${{N}_{2}}$are the mole of solute and solvent then

1) $({{P}_{o}}-{{P}_{s}})/{{P}_{o}}={{N}_{1}}/({{N}_{1}}+{{N}_{2}})$

2) $({{P}_{o}}-{{P}_{s}})/{{P}_{s}}={{N}_{1}}/{{N}_{2}}$

3) ${{P}_{s}}={{P}_{o}}\,\times \,{{N}_{2}}/({{N}_{1}}+{{N}_{2}})$

4) All

Solution:

Explanation: No Explanation

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