In Kjeldahl method, function of \( \mathrm{CuSO}_{4} \) is:....

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In Kjeldahl method, function of \( \mathrm{CuSO}_{4} \) is:
(1) B.P. elevator
\( \mathrm{P} \)
(2) catalyst
W
(3) freezing point depressator
(4) none of these


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