Home
Class 12
CHEMISTRY
van't Hoff factor (i)...

van't Hoff factor (i)

A

Is less than one in case of dissociation

B

is more than one in case of association

C

i=normal molecular mass /oberved molecular mass

D

i=observed molecular mass/normal molecular mass

Text Solution

Verified by Experts

The correct Answer is:
C
`i = "observed colligative properties"/"normal colligative properties"`
`"(colligative properties)" prop 1/"molar mass"`
Promotional Banner

Topper's Solved these Questions

  • SOLUTION & COLLIGATIVE PROPERTIES

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Numericals)|175 Videos

  • SOLUTION & COLLIGATIVE PROPERTIES

    NIKITA PUBLICATION|Exercise Questions from Competition Exam|43 Videos

  • SOLID STATE

    NIKITA PUBLICATION|Exercise Question from Competition Exam|39 Videos

Similar Questions

Explore conceptually related problems

Colligative properties i.e., the properties of solution which depends upon the number pf aprticles present in solution are osmotic pressure, depression in freezing point, elevation in boiling point and lowering in vapour pressure. Experimental values of colligative properties for electroetically because electrolytes dissociates to furnish more ions in solution. On the other hand experimentally obtained values of colligative properties for associating nature of solute ate lower than those obtained theoretically. The ratio of experimantal colligative properties to theoretical colligative properties is called as van't Hoff factor (i) . van,t Hoff factor (i) for dimerisation of benzoic acid in water, assuming 30% degree of association is:

Select and write the most appropriate answer from the given alternatives for each sub-question: The substance 'X', when dissolved in solvent water gave molar mass corresponding to the molecular formula 'X_(3)' . The van't Hoff factor (i) is :

If alpha is the degree of dissociation of Na_(2)SO_(4) the van't Hoff's factor (i) used for calculating the molecular mass is

The degree of dissociation (alpha) of a weak electrolyte, A_(x)B_(y) is related to van't Hoff's factor (i) by the expression:

One mole of a solute A is dissolved in a given volume of solvent. The association of the solute take place as follows: nAhArrA_(n) If alpha is the degree of association of A, the van't Hoff factor i is expressed as:

A solute forms a pentamer when dissolved in a solvent. The van't Hoff factors 'I' for the solute will be :

The electrolyte solutions show abnormal colligative porperties.To account for this effect we define a quantity called the Van't Hoff factor given by i=("Actual number of particles in solution after dissociation")/("Number of formula units initially dissolved in solution") i=1 ("for non-electrolytes") igt1 ("for electrolytes, undergoing dissociation") ilt1 ("for solutes, undergoing association") Answer the following questions: certain substances trimerize when dissolved in a solvent A . The Van't Hoff factor i for the solutions is

NIKITA PUBLICATION-SOLUTION & COLLIGATIVE PROPERTIES -Questions from Competition Exam
  1. van't Hoff factor (i)

    Text Solution

    |

  2. The molal freezing point for water is 1.86^(@)C mol^(-1). If 342g of c...

    Text Solution

    |

  3. The BaCl(2) ionises to an extent of 80% in aqueous solution, the value...

    Text Solution

    |

  4. Equal masses of methane and oxygen are mixed in an empty container at ...

    Text Solution

    |

  5. An aqueous solution is 1.00 molal in KI. Which change will cause the v...

    Text Solution

    |

  6. A solution of sucrose (molar mass = 342 "g mol"^(-1)) has been prepare...

    Text Solution

    |

  7. If sodium sulphate is considered to be completely dissociated into cat...

    Text Solution

    |

  8. If 10^(-4) dm^(3) of water is introduced into a 1.0 dm^(3) flask to 30...

    Text Solution

    |

  9. On mixing, heptane and octane form an ideal solution. At 373K the vapo...

    Text Solution

    |

  10. K(b) for water is 0.52 K/m. Then, 0.1 m solution of NaCl will boil app...

    Text Solution

    |

  11. 138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole ...

    Text Solution

    |

  12. Two solutions of a substance (non-electroyte) are mixed in the followi...

    Text Solution

    |

  13. 20 g of a binary electrolyte (Molecular mass =100) are dissolved in 50...

    Text Solution

    |

  14. Which one of the following in the ratio of the lowering of V.P. of 0.1...

    Text Solution

    |

  15. A 0.1 molal aqueous solution of a weak acid is 30% ionized. If K(f) fo...

    Text Solution

    |

  16. 200 mL of an aqueous solution of a protein contains its 1.26g. The osm...

    Text Solution

    |

  17. The freezing point depression constant for water is 1.86^(@)K Kgmol^(-...

    Text Solution

    |

  18. The van't Hoff factor i for a compound which undergoes dissociation in...

    Text Solution

    |

  19. Mole fraction of a solution in 1.00 molal aqueous solution is

    Text Solution

    |

  20. The degree of dissociation (alpha) of a weak electrolyte A(x)B(y) is ...

    Text Solution

    |

  21. Ethylene glycol is used as an antifreeze in a cold climate. Mass of et...

    Text Solution

    |