In Kjeldahl's method of estimation of nitrogen, CuSO4 act as:
A
oxidising agent
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B
reducing agent
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C
catalytic agent
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D
hydrolysis agent
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Solution
The correct option is B catalytic agent Kjeldahl's method is used for the estimation of nitrogen. The organic compound is heated with conc. H2SO4 in presence of K2SO4 and a little CuSO4 to convert all the nitrogen into (NH4)2SO4⋅K2SO4 raises the boiling point of H2SO4 while CuSO4 catalyses the reaction. Option C is correct.