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Q.

The blood red colour in the combination test of nitrogen and sulphur in organic compound is the to 
the formation of

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a

Ferric acetate

b

Ferric cyanide

c

Ferric thiocyanate

d

Ferrous sulpho cyanide

answer is A.

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Detailed Solution

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The black red colour in S.F.E test for N & S is due to the formation of Fe(CNS)3

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