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In Kjeldahl’s method for the estimation of $N_{2}$ , potassium sulphate and copper sulphate are used. The function of them is
I. Potassium sulphate raises the bpt. And ensures complete reaction.

II. Copper sulphate acts as catalyst.

III. Potassium sulphate acts as catalyst and copper sulphate raises the bpt.

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Only III is correct

I and II are correct

Only II is Correct

None is correct

answer is B.

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Detailed Solution

$K_{2} S O_{4}$ raises bpt. And $C u S O_{4}$ acts as catalyst.

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