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For the following acids underset("(I)"...

For the following acids
`underset("(I)")((CH_(3))_(3)C CH_(2)CO_(2)H)" "underset(("II"))overset(oplus" ")((CH_(3))_(3)NCH_(2)CO_(2)H)" "underset((III))(CH_(3)COOH)`
`pK_(a)` value will be in order

A

`IgtIIgtIII`

B

`IltIIltIII`

C

`IgtIIIgtII`

D

`IIgtIIIgtI`

Text Solution

Verified by Experts

The correct Answer is:
C
EWG increases acidic strength `(-I,-M)` EDG decreases acidic strength.
I. `CH_(3)-undersetunderset(CH_(3))(|)oversetoverset(CH_(3))(|)(C)-CH_(2)-COO^(-)` II. `CH_(3)-undersetunderset(CH_(3))(|)oversetoverset(CH_(3))(|)(N^(oplus))-CH_(2)-COO^(-)` III. `CH_(3)-oversetoverset(O)(||)(C)-O^(-)`
`pK_(a)prop(1)/(K_(a))andK_(a)prop` Stability of carboxylate ion.
Stability of ion is `IIgtIIIgtIimplies K_(a)IIgtIIIgtIimpliespK_(a)IIltIIIltI`
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