• # question_answer In Kjeldahl's method for the estimation of nitrogen, the formula used is A) $%N=\frac{1.4\text{ }V\text{ }W}{N}$ B) $%N=\frac{1.4\text{ }N\text{ }W}{V}$ C) $%N=\frac{V\text{ }N\text{ }W}{1.8}$ D) $%N=\frac{1.4\text{ }V\text{ }N}{W}$

Solution :

% 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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