JEE Main & Advanced Chemistry Organic Chemistry: Some Basic Principles & Techniques Question Bank Chemical analysis of organic compounds

  • 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) \[%N=\frac{1.4\text{ }V\text{ }N}{W}\]

    Correct Answer: D

    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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