The dissociation constant of two acids `HA_(1)` and `HA_(2)` are `4.5 xx 10^(-4)` and `1.8 xx 10^(-5)` respectively. If both are having equal concentrations the relative strength of acids is

Options

A. `5:2`
B. `2:5`
C. `5:1`
D. `1:5`

Answer

C

Explanation

`(alpha_(1))/(alpha_(2)) = sqrt((K_(1))/(K_(2)))`
`=sqrt((4.5 xx 10^(-4))/(1.8 xx 10^(-5))) = 5 : 1`