`pK_(a)` values of two acids. A and B are 4 and 5. The strengths of these two acids are related as

Options

A. Acid A is 10 times stronger than acids B
B. Strength of acid A : strength of acid B  4 : 5
C. The strengths of the two acids can not be compared
D. Acid B is 10 times stronger than acid A

Answer

A

Explanation

`pK_(a)` of acid A= 4 , `pK_(a) ` of acid B = 5
We know that `pK_(a) = - log K_(a)`
` :. ` Acid A `K_(a) = 10^(-4) , `Acid B `K_(a) = 10^(-5)`
Hence A is ten times stronger than that of B.