ln Kjeldahl's method of estimation of $N, {CuSO}_{4}$ acts as

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Hydrolysis agent

Catalytic agent

Reducing agent

Oxidising agent

answer is C.

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Detailed Solution

Kjeldahl's method depends upon the fact that most of the organic compounds containing nitrogen are quantitatively decomposed to give (NH₄)₂SO₄ when heated strongly with conc.H₂SO₄. In this method CuSO₄ acts as a catalyst.

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