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The catalyst used in Kjeldahl’s method for the estimation of nitrogen is :

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Copper sulphate

Magnesium

Sodium

V₂O₅

answer is A.

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Detailed Solution

Kjeldahl's method is a faster method than Dumas' method. However, this method is used only for those organic compounds that are converted quantitatively to ammonium sulphate on heating strongly with concentrated sulphuric acid.

It involves CuSO₄or Hg as catalyst.

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