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A 6% solution of urea is isotonic with...

A 6% solution of urea is isotonic with

A

0.05 M solution of glucose

B

6% solution of glucose

C

25% solution of glucose

D

1M solution of glucose

Text Solution

Verified by Experts

The correct Answer is:
D
When a solution of urea (6%) is isotonic with a solution of glucose
`pi_("glucose ")= C_("urea")`
`:.((w_(g)xx1000)/(m_(g)xx100))=((w_(u)xx1000)/(m_(u)xx100))`
where `w_(g)=` mass of glucose `=xg`
`m_(g)=` molecular mass o glucose `=180`
`w_(u)=` mass of urea =6g
`m_(u)=` molecular mass of urea =60
`:.(x xx 1000)/(180xx100)=(6xx1000)/(60xx100)impliesx=18g`
Thus 18 g of glucose are present in 100 ml of solution.
In other words 1M solution of glucose (18 g in 100 ml) is isotonic with 6% solution of urea.
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Knowledge Check

  • 3% aqueous solution of urea is isotonic with 9% aqueous solution of an organic solute (B). The mol. Mass of B is

    A
    90
    B
    45
    C
    342
    D
    180

  • 1% (wt./vol) solution of urea is isotonic with 3% (wt./vol.) solution of a non electrolytic solute . The mol. Wt. of solute is

    A
    240
    B
    120
    C
    180
    D
    60

  • 0.06% (w/v) aqueous solution of urea is isotonic with

    A
    `0.6%` glucose solution
    B
    0.1 M glucose solution
    C
    `0.06%` glucose solution
    D
    0.01 M glucose solution.

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