`100cm^3` of a solution of an acid (Molar mass `=98`) containing `29.4g` of the acid per litre were completely neutralized by `90.0 cm^3` of aq. `NaOH` containing `20g` of `NaOH` per `500cm^3`. The basicity of the acid is :

Options

A. 3
B. 2
C. 1
D. data insufficient

Answer

A

Explanation

m eq. of acid =m eq. of base
`:. N_(1)V_(1)=N_(2)V_(2)`
`(29.4)/((98)/(n))xx100=90xx((20)/(40)xx(1000)/(500))" " :. n=3`