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NEET levelSingle correct optionDifficulty 1 of 3ie009

Four monobasic weak acids have the following $p K_{a}$ values. Which value belongs to the strongest acid?

A $2.87$
B $4.76$
C $3.75$
D $9.25$

Answer: A

A smaller

p K_{a}

means a larger

K_{a}

(

K_{a} = 1 0^{- p K_{a}}

) and so a stronger acid. The smallest value is

2.87

.

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