In Kjeldahl's method for the estimation of nitrogen, the formula … - Vidyadip

MCQ

In Kjeldahl's method for the estimation of nitrogen, the formula used is

A
$\% N = \frac{{1.4\,{\rm{ }}V{\rm{ }}W}}{N}$
B
$\% N = \frac{{1.4\,{\rm{ }}N{\rm{ }}W}}{V}$
C
$\% N = \frac{{V{\rm{ }}N{\rm{ }}W}}{{1.8}}$
✓
$\% N = \frac{{1.4{\rm{ }}V{\rm{ }}N}}{W}$

✓

Answer

Correct option: D.

$\% N = \frac{{1.4{\rm{ }}V{\rm{ }}N}}{W}$

d
(d) $\%$ of $N = \frac{{1.4 \times V \times N}}{W}$

where $V$ = Volume of acid used

$N$ = Normality of acid, $W$ = Weight of substance

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