Home
Class 12
CHEMISTRY
The vapour pressure of a solution contai...

The vapour pressure of a solution containing non volatile solute is less than the vapour pressure of pure of solvent. Give reason.

Text Solution

Verified by Experts

In pure solvent the surface is oC Cupied by solvent molecules only. Number of molecules evpoarating will be more, hence vapour pressure is more. In case of solution the surface is oC Cupied by both solute and solvent molecules. The number of molecules evaporating will be less in case of solution containing non volatile solute. Hence the vapour pressure of solution containing non volatile solute is less than the vapour pressure of pure solvent.
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS|10 Videos

  • SOLUTIONS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|10 Videos

  • SOLUTIONS

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise VERY SHORT ANSWER QUESTIONS|29 Videos

  • SOLID STATE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|27 Videos

  • SURFACE CHEMISTRY

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise INTEXT QUESTIONS|8 Videos

Similar Questions

Explore conceptually related problems

Calculate the vapour pressure of a solution containing 10gm of non-volatile solute in 80gm of ethanol of at 298K [The vapour pressure of pure ethanol at 298K is 22.45 mm and Molecular weight of solute is 120]

Which of the following statements are correct (a) the boiling point of a solution is greater than pure solvent (b) the temperature where the vapour pressure of liquid equals to atmospheric pressure is called its boiling point (c) the vapour pressure of pure solvent is less than the vapour pressure of solution containing non volatile solute. (d) the temperature of liquid remained in the container after evaporation is more than before the evaparation

At a given temperature (a) Vapour pressure of a solution containing nonvolatile solute is proportional to mole fraction of solvent (b) Lowering of vapour pressure of solution containing nonvolatile solute is proportional to mole fraction of solute (c) Relative lowering of vapour pressure is equal to mole fraction of solute

At 50^@C the vapour pressure of H_2O is 92mm Hg. The vapour pressure of a solution containing 18.1g of non volatile solute in 100ml H_2O at the same temperature is 87mm Hg. Find the molecular weight of the solute.

Calculate the vapour pressure of a solution containing 9g of glucose in 162g of water at 293K. The vapour pressure of water of 293K is 17.535mm Hg.

Assertion: The pressure exerted by the vapour of a liquid at equilibrium at a given temperature is called its vapour pressure. Reason: If a nonvolatile solute is added to a solvent to give a solution, the vapour pressure of the solution is found to be greater than the vapour pressure of the pure solvent.

In the depression of freezing point experiment, it is found that (a) The vapour pressure of the solution is less than that of pure solvent (b) The vapour pressure of the solution is more than that of pure solvent (c) Only solute molecules solidify at the freezing point (d) Only solvent molecules solidify at the freezing point

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-SOLUTIONS -SHORT ANWER QUESTIONS
  1. A solution of glucose in water is labelled as 10% w/w. What would be t...

    Text Solution

    |

  2. A solution of sucrose in water is labelled as 20% w/w. What would be t...

    Text Solution

    |

  3. How many ml of 0.1 HCl is required to react completely with 1.0g mixtu...

    Text Solution

    |

  4. A solution is obtained by mixing 300g of 25% solution and 400g of 40% ...

    Text Solution

    |

  5. An antifreeze solution is prepared from 222.6g of ethylene glycol [(C(...

    Text Solution

    |

  6. Why do gases always tend to be less soluble in liquids as the temperat...

    Text Solution

    |

  7. What is meant by positive deviations from Raoult's law and how is the ...

    Text Solution

    |

  8. What is meant by negative deviation from Raoult's law and how is the s...

    Text Solution

    |

  9. The vapour pressure of water is 12.3 k P(a) at 300 K. Calculate the va...

    Text Solution

    |

  10. Calculate the mass of a non-volatile solute (molar mass 40"g mol"^(-1)...

    Text Solution

    |

  11. A 5% solution (by mass) of cane suger in water has freezing point of 2...

    Text Solution

    |

  12. If the osmotic pressure of glucose solution is 1.52 bar at 300 K. What...

    Text Solution

    |

  13. Vapour pressure of of water at 293K is 17.535 mm Hg. Calculate the vap...

    Text Solution

    |

  14. How is molar mass related to the elevation in boiling point of a solut...

    Text Solution

    |

  15. What is an ideal solution ?

    Text Solution

    |

  16. What is relative lowering of vapour pressure ? How is it useful to det...

    Text Solution

    |

  17. How is molar mass related to the depression in freezing point of a sol...

    Text Solution

    |

  18. The vapour pressure of a solution containing non volatile solute is le...

    Text Solution

    |

  19. Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50g urea (NH(2)C...

    Text Solution

    |

  20. Calculate the vapour pressure of a solution containing 9g of glucose i...

    Text Solution

    |