Among the following acids which has the lowest pKa value?
Among the following acids which has the lowest pKa value?
(a) CH3COOH
(b) (CH3)2CH – COOH
(c) HCOOH
(d) CH3CH2COOH
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(b) : Higher the pKa value, weaker is the acid. Hence, strongest acid has lowest pKa value.
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Correct Option (c) HCOOH
Explanation:
Stronger the acid, lower is their pKa value. Thus, Out of the given acids, strongest acid is HCOOH Hence, HCOOH possess lowest pKa value
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