Which of the following is a $FALSE$ statement?

  • A
    Carius tube is used in the estimation of sulphur in an organic compound.
  • B
    Carius method is used for the estimation of nitrogen in an organic compound.
  • C
    Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as $Mg_2P_2O_7$ by adding magnesia mixture.
  • D
    Kjeldahl's method is used for the estimation of nitrogen in an organic compound.

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In $Duma's$ method of estimation of nitrogen,$0.35 \ g$ of an organic compound gave $55 \ mL$ of nitrogen collected at $300 \ K$ temperature and $715 \ mm$ pressure. The percentage of nitrogen in the compound is (aqueous tension at $300 \ K = 15 \ mm$). (in $.45$)

An organic compound gives $0.220 \ g$ of $CO_2$ and $0.126 \ g$ of $H_2O$ on complete combustion. If the $\%$ of carbon is $24$,then the $\%$ of hydrogen is $...... \times 10^{-1}$. $(Nearest \ integer)$

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