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Arrange in order of increasing acidic st...

Arrange in order of increasing acidic strength

A

`X gt Z gt Y`

B

`Z gt X gt Y`

C

`X gt Y gt Z`

D

`Z gt X gt Y`

Text Solution

Verified by Experts

The correct Answer is:
A
`pK_(a)` value of carboxylic group is less than `pK_(a)` of `overset(+)(N)H_(3)` in amino acid and `-overset(+)(N)H_(3)` (Z) will have comparatively less `pK_(a)` than `-overset(+)(N)H_(3)` (Y) due to -I effect of carboxylic group. We know that acidic strength is inversely proportional to `pK_(a)`. Hence, correct order of acidic strength is `-CO_(2)H_((X)) gt -overset(+)(N)H_(3(Z)) gt - overset(+)(N)H_(3(Y))`
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Knowledge Check

  • Arrange in order of increasing acid strength

    A
    `X gt Z gt Y`
    B
    `Z lt X gt Y`
    C
    `X gt Y gt Z`
    D
    `Z gt X gt Y`

  • Arrange in order of increasing acid strength

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    `X gt Z gt Y`
    B
    `Z lt X gt Y`
    C
    `X gt Y gt Z`
    D
    `Z gt X gt Y`

  • Arrange in the order of increasing acidic strength :

    A
    `AltBltC`
    B
    `AltCltB`
    C
    `BltAltC`
    D
    `BltCltA`

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