0.45 ~g of acid molecular weight 90 is neutralised by 20 ml of 0.5 ~N caustic potash. The basicity of acid is

Step-by-step solution

Eq. of acid = Eq of base, array l 0.45 E wt = 20 0.5 1000 = E wt =45 Basicity = M wt E wt = 90 45 =2 array