Home
Class 12
CHEMISTRY
A solution of urea (mol. Mass 60 g mol^(...

A solution of urea (mol. Mass `60 g mol^(-1)`) boils of `100.18^(@)C` at one one atmospheric pressure. If `k_(f)` and `K_(b)` for water are `1.86` and `0.512 K kg mol^(-1)` respectively, the above solution will freeze at:

A

`-6.54^(@)C`

B

`6.54^(@)C`

C

`0.654^(@)C`

D

`-0.654^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
D
`Delta T_(b)=0.18 , Delta T_(b)=m K_(b)`
`(0.18)/(Delta T_(f))=(mK_(b))/(m K_(f)) , (0.18xx1.86)/(0.512)=Delta T_(f) , Delta T_(f)=0.653`
`T^(+)-T_(s)=0.653 , T_(s)=0-0.653^(@)C , T_(s)=-0.653^(@)C`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SOLUTION

    ERRORLESS |Exercise ORDINARY THINKING OBJECTIVE QUESTIONS (Abnormal molecular mass )|21 Videos

  • SOLUTION

    ERRORLESS |Exercise Critical Thinking (Objective Questions)|28 Videos

  • SOLUTION

    ERRORLESS |Exercise ORDINARY THINKING OBJECTIVE QUESTIONS (Elevation in boiling point )|34 Videos

  • SOLID STATE

    ERRORLESS |Exercise JEE section (Numeric )|1 Videos

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS |Exercise JEE Section (Matrix Match type questions)|3 Videos

Similar Questions

Explore conceptually related problems

A solution of urea in water has boiling point of 100.15^(@)C . Calculate the freezing point of the same solution if K_(f) and K_(b) for water are 1.87 K kg mol^(-1) and 0.52 K kg mol^(-1) , respectively.

A solution of urea (mol mass 56 g mol^(-1)) boils at 100.18^(@)C at the atmospheric pressure. If K_(f) and K_(b) for water are 1.86 and 0.512K kg mol^(-1) respectively, the above solution will freeze at,

Knowledge Check

  • A solution of urea (mol. Mass 56 g mol ^(-1) ) boils at 100.18^(@)C at the atmospheric pressure. If K_(f) and K_(b) for water are 1.86 and 0.512 K kg mol ^(-1) respectively, the above solution will freeze at

    A
    `0.654^(@)C`
    B
    `-0.654^(@)C`
    C
    `6.54^(@)C`
    D
    `-6.54^(@)C`

  • A solution of urea (mol. Mass "56 g mol"^(-1) ) boils at 100.18^(@)C at the atmospheric pressure. If K_(f) and K_(b) for water are "1.86 and 0.512 K kg mol"^(-1) respectively, the above solution will freeze at

    A
    `-6.54^(@)C`
    B
    `-0.654^(@)C`
    C
    `6.54^(@)C`
    D
    `0.654^(@)C`

  • A solution of urea (molecular mass = 60 g mol^(-1) ) boils at 100.18^(@)C at atmospheric pressure. If K_(f) "and" K_(b) for water are 1.86 and 0.512 K kg mol^(-1) respectively, the above solution will freeze at :

    A
    `0.654^(@)C`
    B
    `-0.654^(@)C`
    C
    `6.54^(@)C`
    D
    `-6.54^(@)C`

    • Similar Questions

    Explore conceptually related problems

    A solution of urea (mol. mass = 56 g mol ""^(-1) ) boils at 100.78^@ C at the atmospheric pressure. If K_f and K_b for water are 1.86 and 0.512 K kg mol-respectively, then the above solution will freeze at:

    A solution of ‘X’ (molar mass 60 g mol^(-1) ) in water boils at 100.18^@C at the atmospheric pressure.If K_f and K_b for water are 1.86 and 0.52 K kg mol^(-1) respectively, then the freezing point of the solution is :

    An aqeous solution of urea (mol. Mass 60 g mol^(-1)) boils at 100.80^(@)C at 1 atm. Find the freezing temperature of solution. Given : K_(f) and K_(b) for water are 1.86 and 0.512 K kg mol^(-1) , respectively.

    The difference between the boiling point and freezing point of an aqueous solution containing sucrose (molecular mass = 342 g mol^(-1)) in 100 g of water is 105.04 . If K_(f) and K_(b) of water are 1.86 and 0.51 Kg mol^(-1) respectively, the weight of sucrose in the solution is about

    An aqueous solution freezes on 0.36^@C K_f and K_b for water are 1.8 and 0.52 k kg mol^-1 respectively then value of boiling point of solution as 1 atm pressure is

    Home
    Profile