Which of the following compounds will not give Lassaignes test for nitrogen?

Question

Which of the following compounds will not give Lassaignes test for nitrogen? (A) NH 2 NH 2 (B) C 6 H 5 NHNH 2 (C)  PhN=NPh  (D) NH 2 CONH 2

Tardigrade Admin · Accepted Answer

Presence of carbon alongwith nitrogen is an essential condition for giving positive Lassaignes test for nitrogen. Hence, NH2 .NH2 (due to absence of carbon) does not give Lassaignes test for nitrogen.

Q. Which of the following compounds will not give Lassaignes test for nitrogen?

$N H_{2} N H_{2}$

$C_{6} H_{5} N H N H_{2}$

$P h N = NP h$

$N H_{2} CON H_{2}$

Presence of carbon alongwith nitrogen is an essential condition for giving positive Lassaignes test for nitrogen.
Hence, $N H_{2} . N H_{2}$ (due to absence of carbon) does not give Lassaignes test for nitrogen.

Q. Which of the following compounds will not give Lassaignes test for nitrogen?

NH2​NH2​

C6​H5​NHNH2​

PhN=NPh

NH2​CONH2​

Presence of carbon alongwith nitrogen is an essential condition for giving positive Lassaignes test for nitrogen. Hence, NH2​.NH2​ (due to absence of carbon) does not give Lassaignes test for nitrogen.

$N H_{2} N H_{2}$

$C_{6} H_{5} N H N H_{2}$

$P h N = NP h$

$N H_{2} CON H_{2}$

Presence of carbon alongwith nitrogen is an essential condition for giving positive Lassaignes test for nitrogen.
Hence, $N H_{2} . N H_{2}$ (due to absence of carbon) does not give Lassaignes test for nitrogen.