Element Detection & Lassaigne's Test

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1.
When both N and S are present in an organic compound, Lassaigne's extract gives blood-red color with FeCl3 because:
2.
The sodium nitroprusside test for sulfur produces:
3.
AgCl is distinguished from AgBr by:
4.
Before testing for halogens in Lassaigne's extract, CN- and S2- must be removed by:
5.
In Lassaigne's test, nitrogen is detected by the formation of:

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