In Kjeldahl's method for estimation of nitrogen, CuSO4 acts as

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oxidising agent

reducing agent

catalytic agent

hydrolysis agent

answer is C.

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Detailed Solution

In Kjeldahl's method (used for the estimation of nitrogen) the organic compound is heated with conc. H2SO4 in the presence of K2SO4 (used to elevate boiling point of H2SO4) and CuSO4 (used as catalyst) to convert all the nitrogen into (NH4)2SO4..

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