`100 cm^(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. 4

Answer

A

Explanation

m-eq. of acid `= m - eq.` of base
`therefore N _(1) V _(1) = N_(2) V _(2)`
`(29.4)/( ( (98)/(n ))) xx 100 = 90 xx (( 20)/(40) xx (1000)/( 500)) n =3`