In the test of sulphur violet colour of sodium thionitroprusside is formed. What is the formula of sodium thionitroprusside.

What is the chemical formula of sodium nitroprusside ?

Lassaigne's test gives a violet colouration with sodium nitroprusside, it indicates

For detection of sulphur in an organic compound, sodium nitroprusside is added to the sodium extract. A violet colour is obtained which is due to the formation of

For detection of sulphur in an arganic compound, sodium nitroprusside is added to the sodium extract. A violet colour is obtained due to the formation of: