Mustard Oil Test

Q. In which of the following reactions the final product will give a black precipitate of HgS when treated with $C{S}_2$ followed by $HgC{l}_2$?

1. 
2. 
3. 
4. 

Q.

Primary amine on heating with $C{S}_2$followed by excess of mercuric chloride gives Isothiocyanate. The reaction is called

1. Hofmann mustard oil reaction

2. Perkin reaction

3. Fries reaction

4. Diels Alder reaction.

Q.

Primary amine on heating with $C{S}_2$followed by excess of mercuric chloride gives Isothiocyanate. The reaction is called

1. Hofmann mustard oil reaction

2. Perkin reaction

3. Fries reaction

4. Diels Alder reaction.