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Which of the following is the weakest ac...

Which of the following is the weakest acid ?

A

Phenol `(K_(a)=1.3xx10^(10))`

B

Hydrocyanic acid `(K_(a)=4.9xx10^(-10))`

C

Acetic acid `(K_(a)=1.8xx10^(-5))`

D

Benzoic acid `(K_(a)=6.5xx10^(-5))`

Text Solution

Verified by Experts

The correct Answer is:
A
At a given temperature `T, K_(a)` is a mesure of the strength of the acid HA. The larger the value of `K_(a)`, the stronger is the acid.
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