In a Lassaigne's test for sulphur in the organic compound with sodium nitroprusside solution the purple colour formed is due to

In Lassaigne's test for N, S and halogens, organic compound is

In Lassaigne's test, the organic compound is fused with sodium metal so as to

In the Lassaigne's , test the sulphur present in the organic compound first changes into :

In Lassaigne’s test, the organic compound is fused with sodium metal so as to

The sulphide ion gives purple colour which sodium nitroprusside. The purple colour is due to the formation of:

In Lassaigne’s test, the organic compound is fused with a piece of sodium metal in order to

Which of the following complex formation indicates the presence of sulphur in the organic compound when sodium nitroprusside is added to sodium extract of the compound ?