Home
Class 12
CHEMISTRY
(a) Define the following terms : (i) M...

(a) Define the following terms :
(i) Mole fraction
(ii) Ideal solution
(b) `15.0`g of an unknown molecular material is dissolved in 450g of water . The resulting solution freezes at `-0.34^(@)C` . What is the molar mass of the material ?
`(K_(f)` for water = `1.86` K kg `mol^(-1))`

Text Solution

Verified by Experts

(b) Refer solution to Parctice Problem 61. (Page 71).
Promotional Banner

Topper's Solved these Questions

  • SOLUTIONS

    MODERN PUBLICATION|Exercise REVISION EXERCISES (NUMERICAL PROBLEMS)|17 Videos

  • SOLUTIONS

    MODERN PUBLICATION|Exercise HIGHER ORDER THINKING SKILLS|14 Videos

  • SOLUTIONS

    MODERN PUBLICATION|Exercise REVISION EXERCISES (SHORT ANSWER QUESTIONS)|60 Videos

  • SOLID STATE

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|13 Videos

  • SURFACE CHEMISTRY

    MODERN PUBLICATION|Exercise COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) (MATCHING LIST TYPE QUESTIONS)|2 Videos

Similar Questions

Explore conceptually related problems

15.0 g of an unknown molecular material was dissolved in 450 g of water. The reusulting solution was found to freeze at -0.34 .^(@)C . What is the the molar mass of this material. ( K_(f) for water = 1.86 K kg mol^(-1) )

31g of an unknown molecular material is dissolved in 500g of water . The resulting solution freezes at 271.14K . Calculate the molar mass of the material[Given K_(f) = 1.86 K kg mol^-1 and T_(f)^(@) of water = 273K]

6 g of a substance is dissolved in 100 g of water depresses the freezing point by 0.93^(@)C . The molecular mass of the substance will be: ( K_(f) for water = 1.86^(@)C /molal)

MODERN PUBLICATION-SOLUTIONS-REVISION EXERCISES (LONG ANSWER QUESTIONS)
  1. What is osmotic pressure ? Why it is a colligative property ?

    Text Solution

    |

  2. Calculate the molarity of a solution containing 5 g of NaOH in 450 mL...

    Text Solution

    |

  3. Converting molarity to mole fraction, mass percent and molality: A 0.7...

    Text Solution

    |

  4. (a) Define the terms osmosis and osmotic pressure. Is the osmotic pres...

    Text Solution

    |

  5. Number of moles of a solute per kilogram of a solvent is called

    Text Solution

    |

  6. The van’t Hoff factor can be expressed as :

    Text Solution

    |

  7. The vapour pressure of pure benzene at a certain temperature is 0.850 ...

    Text Solution

    |

  8. The boiling a point of benzene is 353.23K. When 1.80 g of a non-volati...

    Text Solution

    |

  9. (i) Prove that depression in freezing point is a colligative property...

    Text Solution

    |

  10. (i) Prove that osmotic pressure is a colligative property. (ii) Calc...

    Text Solution

    |

  11. Vapor pressure of a solution of Volatile components and composition of...

    Text Solution

    |

  12. (a) Define the following terms: (i) Molarity (ii) Molal elevation ...

    Text Solution

    |

  13. (a) Define the following terms : (i) Mole fraction (ii) Ideal solu...

    Text Solution

    |

  14. (a) Explain the following : (i) Henry's law about dissolution of a ...

    Text Solution

    |

  15. (a) State Raoult law for a solution containing volatile components. ...

    Text Solution

    |

  16. A solution of glucose ("molar mass"= 180g mol^(-1)) in water is labell...

    Text Solution

    |

  17. (a) Define the following terms: (i) Molarity (ii) Molal elevation ...

    Text Solution

    |

  18. What type of devation is shown by a mixture of ethnol and acetone ? Wh...

    Text Solution

    |

  19. (a) A 10% solution (by mass) of sucrose in water has freezing point of...

    Text Solution

    |

  20. 30 g of urea (M=60g mol^(-1)) is dissolved in 846g of water. Calculate...

    Text Solution

    |