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Statemet-1 : Glucose gives a reddish-bro...

Statemet-1 : Glucose gives a reddish-brown precipitate with Fehling's solution.
Statement-2 : Reaction of glucose with Fehling's solution gives `CuO` and gluconic acid.

A

Statement `I` is true, Statement `II` is true, Statements `II` is the correct explanation of Statement `I`.

B

Statement `I` is true, Statement `II` is true, Statement `II` is not the correct explanation of Statement `I`.

C

Statement `I` is true, Statement `II` is false.

D

Statement `I` is false, Statement `II` is true.

Text Solution

Verified by Experts

The correct Answer is:
C
Statement `I` is true but statement `II` is false because `Cu^(2+)` of Fehling's solution, `[Cu (NH_(3))_(4)]^(2+)(OH)_(2)`, is reduced to `Cu^(+)` to give a red precpitate of `Cu_(2)O`.
`OCH(CHOH)_(4)CH_(2)OH+Cu^(2+)+overset(Θ)OH rarr .^(Θ)OOC-(CHOH)_(4)CH_(2)OH" gluconic acid" +Cu_(2)O+H_(2)O`
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Knowledge Check

  • Fehling solution gives red precipitate with

    A
    aromatic aldehyde
    B
    saturated aliphatic aldehyde
    C
    unsaturated aliphatic aldehyde
    D
    both b and c

  • Fehling solution givers red precipitate with:

    A
    aromatic aldehyde
    B
    aliphatic aldehyde
    C
    ketone
    D
    `alpha`- hydroxy ketones
    • CENGAGE CHEMISTRY ENGLISH-BIOMOLECULES-Exercises Archives (Assertion-Reasoning)
    1. Statemet-1 : Glucose gives a reddish-brown precipitate with Fehling's ...

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