Which of the following compounds will not give Lassaigne’s test for nitrogen?

Question

Which of the following compounds will not give Lassaigne’s test for nitrogen? (A) NH2NH2 (B) C6H5NHNH2 (C) PhN=NPh (D) NH2CONH2

Tardigrade Admin · Accepted Answer

In hydrazine, since nitrogen is not directly attached to a carbon atom so, it will not facilitate the Lassaigne’s test.Rest all have C-N bond so they can show it.

Q. Which of the following compounds will not give Lassaigne’s test for nitrogen?

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

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

$P h N = NP h$

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

In hydrazine, since nitrogen is not directly attached to a carbon atom so, it will not facilitate the Lassaigne’s test.Rest all have C-N bond so they can show it.

Q. Which of the following compounds will not give Lassaigne’s test for nitrogen?

NH2​NH2​

C6​H5​NHNH2​

PhN=NPh

NH2​CONH2​

In hydrazine, since nitrogen is not directly attached to a carbon atom so, it will not facilitate the Lassaigne’s test.Rest all have C-N bond so they can show it.

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

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

$P h N = NP h$

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