Home
Class 12
CHEMISTRY
The mass of a non-volatile solute of mol...

The mass of a non-volatile solute of molar mass `40g" "mol^(-1)` that should be dissolved in 114 g of octane to lower its vapour pressure by 20% is

A

10 g

B

11.4 g

C

9.8 g

D

12.8 g

Text Solution

Verified by Experts

The correct Answer is:
A
`(P_(0)-P_(s))/(P_(0))=(20)/(100)`
`(20)/(100)=(w//40)/(114//114+w//40)`
`w=10g`.
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (IDEAL AND NON-IDEAL SOLUTION)|16 Videos

  • SOLUTIONS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (AZEOTROPIC MIXTURE)|9 Videos

  • SOLUTIONS

    ERRORLESS|Exercise NCERT BASED QUESTIONS (COLLIGATIVE PROPERTIES)|8 Videos

  • SOLID STATE

    ERRORLESS|Exercise ASSERTION & REASON|11 Videos

  • SURFACE CHEMISTRY

    ERRORLESS|Exercise ASSERTION AND REASON|14 Videos

Similar Questions

Explore conceptually related problems

Calculate the mass of a non-volatile solute ( molecular mass 40 ) which should be dissolved in 114 g octane to reduce its vapour pressure to 80% .

The mass of a non-volatile solute (Molar mass 40) which should be dissolved in 114g octance to reduce its vapour pressure to 80% is 2xg . Find the value of x

The mass of non-volatile, non-electrolyte solute ("molar mass" = 50 g "mol"^(-1)) needed to be dissolved in 114 g octane to reduce its vapour pressure to 75%, is :

The weight of a non-volatile solute (molecular weight = 40), which should be dissolved in 114g octane to reduce its vapour pressure to 80% is ___________ .

ERRORLESS-SOLUTIONS -NCERT BASED QUESTIONS (LOWERING OF VAPOUR PRESSURE)
  1. Vapour pressure of pure A is 70 mm of Hg at 25^(@)C. If it forms an id...

    Text Solution

    |

  2. At 300 K two pure liquids A and B have vapour pressures respectively 1...

    Text Solution

    |

  3. The mass of a non-volatile solute of molar mass 40g" "mol^(-1) that sh...

    Text Solution

    |

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

    Text Solution

    |

  5. For a non-volatile solute

    Text Solution

    |

  6. A solution is obtained by dissolving 12gof urea(mol.wt.60)in a litre o...

    Text Solution

    |

  7. Equal weight of CH(4) " and " H(2) are mixed in an empty container at ...

    Text Solution

    |

  8. The boiling point of a solution of 0.11g of a substance is 15g of ethe...

    Text Solution

    |

  9. Two beakers of capacity 500 mL were taken. One of these beakers, label...

    Text Solution

    |

  10. An aqueous solution of methanol in water has vapour pressure

    Text Solution

    |

  11. Which solution will show the maximum vapour pressure at 300 K?

    Text Solution

    |

  12. The relative lowering of vapour pressure is equal to the ratio between...

    Text Solution

    |

  13. 5 cm^(3) of acetone is added to 100 cm^(3) of water . Then the va...

    Text Solution

    |

  14. A solution has 1:4 mole ratio of pentane to hexane . The vapour pressu...

    Text Solution

    |

  15. The vapour pressure lowering caused by addition of 100 g of sucrose (m...

    Text Solution

    |

  16. Which of the following is incorrect ?

    Text Solution

    |

  17. An ideal solution was obtained by mixing methanol and ethanol. If the ...

    Text Solution

    |

  18. Which of the following has maximum vapour pressure?

    Text Solution

    |

  19. If two substances A and B have p(A)^(@): p(B)^(@) = 1:2 and have mole ...

    Text Solution

    |

  20. The mass of glucose that would be dissolved in 50g of water in order t...

    Text Solution

    |