Question

The Lassaignes solution of an organic compound with nitrogen; sulphur and chlorine contains:

• A. $NaCN,N{{a}_{2}}S,NaCl$
• B. $KCN,{{K}_{2}}S,KCl$
• C. $AgCl,NaCN,{{K}_{2}}S$
• D. $NaNC,FeS{{O}_{4}},KCl$

Answer 1

Answer: (A)

$NaCN,N{{a}_{2}}S,NaCl$

Answer 2

In Lassaignes solution, If N is present in organic compound, it is present as NaCN in Lassaignes solution. If S is present in organic compound then in Lassaignes solution, it is present as $\text{N}{{\text{a}}_{\text{2}}}\text{S}\text{.}$ If N and S both are present in organic compound then in Lassaignes solution these are present as $\text{NaSCN}\text{.}$ If halogens are present in organic compound then in Lassaignes solution. halogens are present as $\text{NaX}$ (NaCI, NaBr, Nal).