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At pH 4, glycine exists as...

At pH 4, glycine exists as

A

`H_(3)N^(+)-CH_(2)CO O^(-)`

B

`H_(3)N^(+)-CH_(2)CO OH`

C

`H_(2)NCH_(2)CHO OH`

D

`H_(2)NCH_(2)CO O^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
In the acidic medium `(DeltaH=4), C ClO^(-)` groups is protonated.
`H_(3)overset(+)(N)-CH_(2)CO O^(-) overset(H^(+))hArr H_(3)overset(+)(N)-CH_(2)CO OH`
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