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Which of the following orders of acid st...

Which of the following orders of acid strength is correct?

A

`Cl_(3).C.COOH gt Cl_(2).CH.COOH gt Cl.CH_(2).COOH`

B

`CH_(3).CH_(2)-underset(Cl)underset(|)CH.COOH gt CH_(3).underset(Cl)underset(|)CH.CH_(2)COOH gt underset(Cl)underset(|)CH_(2). CH_(2).CH_(2).COOH`

C

`H.COOH gt CH_(3)COOH gt C_(6)H_(5)COOH`

D

`CH_(3)COOH gt CH_(3)CH_(2)COOH gt (CH_(3))_(2)CH.COOH`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(Pka 3.77)(HCOOH) gt underset(Pka 4.17)(C_(6)H_(5)COOH) gt underset(Pka 4.76)(CH_(3)COOH)`
Lower the value of pka stronger will be the acid.
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