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Q.

A sodium fusion extract of an organic compound containing nitrogen and sulphur is prepared by taking excess of sodium. The colour obtained when FeSO4 and H2SO4 are added to this extract

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a

Red

b

Canary yellow

c

Violet

d

Prussian blue

answer is D.

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Detailed Solution

Due to the formation of the following complex,

Fe4Fe(CN)63

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A sodium fusion extract of an organic compound containing nitrogen and sulphur is prepared by taking excess of sodium. The colour obtained when FeSO4 and H2SO4 are added to this extract