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In Kjeldahl’s method for the estimation ofN2 , 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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a

Only III is correct

b

I and II are correct

c

Only II is Correct

d

None is correct

answer is B.

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Detailed Solution

K2SO4 raises bpt. And CuSO4 acts as catalyst.

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In Kjeldahl’s method for the estimation ofN2 , 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.