Question

In Kjeldahl’s method for the estimation of nitrogen, the
foumula used is
(a) %N = 1.4VW/N
(b) %N = 1.4VW/V
(c) %N = VNW/1.8
(d) %N = 1.4 VN/W

Answer 1

The  formula used in the  Kjeldahl’s method for the estimation of nitrogen is given by :  %N = 1.4 VN/W

- In the given formula, the terms denote:

• V = acid used in titration ( measured in ml)

• N = normality of standard acid  used

• W = weight of the organic compound taken (measured in grams)

- so the correct option is (d)