Home
Class 12
CHEMISTRY
The relative lowering of vapour pressure...

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute, is 0.0125. The molality of the solution is

A

0.69 m

B

0.50 m

C

0.80 m

D

0.40 m

Text Solution

Verified by Experts

The correct Answer is:
a
`(p_(@) - p_(s))/(p_(@)) = (mxxM)/(1000)`
`0.0125 = (mxx18)` (molecular weight of `H_(2)O = 18`)
`m = (0.0125xx1000)/(18) = 0.69`
Promotional Banner

Topper's Solved these Questions

  • QUESTION-PAPERS-2018

    BITSAT GUIDE|Exercise CHEMISTRY|40 Videos

  • SOLVED PAPER 2017

    BITSAT GUIDE|Exercise PART II (CHEMISTRY)|40 Videos

Similar Questions

Explore conceptually related problems

Calculate relative lowering of vapour pressure of 0.161 molal aqueous solution

The relative lowering of vapour pressure of an aqueous solution of a non-volatile solute of molecular weight 60 (which neither dissociates nor associates in the solution) is 0.018. If K_(f) of water is 1.86^(@)m^(-1) the depression in freezing point will be :

BITSAT GUIDE-SOLUTION-All Questions
  1. A sugar solution boils at 101^(@)C. The molality of the sugar solution...

    Text Solution

    |

  2. An unknown compound is immiscible with water. It is steam distilled at...

    Text Solution

    |

  3. The relative lowering of vapour pressure of an aqueous solution contai...

    Text Solution

    |

  4. How many grams of H(2)SO(4) is/are to be dissolved to prepare 200 mL a...

    Text Solution

    |

  5. Vapour pressure of pure A is 70 mm of Hg at 25^(@)C. If it forms an id...

    Text Solution

    |

  6. Lowering of vapour pressure is highest for

    Text Solution

    |

  7. Which of the following curves represent the Henry's law

    Text Solution

    |

  8. If p^(@) and p(a) are the vapour pressures of the solvent and solution...

    Text Solution

    |

  9. Which one of them is more volatile component?

    Text Solution

    |

  10. The elevation in boiling point would be highest for

    Text Solution

    |

  11. A 0.2 molal aqueous solution of weak acid (HX) is 20% ionised. The fre...

    Text Solution

    |

  12. The vant Hoff factor for a very dilute solution of Fe(2)(SO(4))(3) is

    Text Solution

    |

  13. The latent heat of vaporisation of water is 9700 "Cal/mole" and if the...

    Text Solution

    |

  14. The relative lowering of vapour pressure of an aqueous solution contai...

    Text Solution

    |

  15. The osmotic pressure of one molar solution at 27^(@)C is

    Text Solution

    |

  16. The freezing point of 0.1 M solution of glucose is -1.86^(@)C. If an e...

    Text Solution

    |

  17. The van't Hoff factor for 0.1 M Ba(NO(3))(2) solution is 2.74. The deg...

    Text Solution

    |

  18. In a 0.2 molal aqueous solution of a week acid HX, the degree of ionis...

    Text Solution

    |

  19. Acetic acid exists in benzene solution in the dimeric form. In an actu...

    Text Solution

    |

  20. A compound X undergoes tetramerisation in a given organic solvent. The...

    Text Solution

    |