Question

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Lassaigne's test is not shown by diazonium salts, though they contain nitrogen. Why?

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Answer 1

hey sis,

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On heating diazonium salt, loses Nitrogen and could not fuse with the Sodium metal therefore diazonium salt does not show Positive Lassaigne's test for Nitrogen

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have a great day...

Answer 2

ᴏɴ ʜᴇᴀᴛɪɴɢ ᴅɪᴀᴢᴏɴɪᴜᴍ sᴀʟᴛ, ʟᴏsᴇs ɴɪᴛʀᴏɢᴇɴ ᴀɴᴅ ᴄᴏᴜʟᴅ ɴᴏᴛ ғᴜsᴇ ᴡɪᴛʜ ᴛʜᴇ sᴏᴅɪᴜᴍ ᴍᴇᴛᴀʟ ᴛʜᴇʀᴇғᴏʀᴇ ᴅɪᴀᴢᴏɴɪᴜᴍ sᴀʟᴛ ᴅᴏᴇs ɴᴏᴛ sʜᴏᴡ ᴘᴏsɪᴛɪᴠᴇ ʟᴀssᴀɪɢɴᴇ's ᴛᴇsᴛ ғᴏʀ ɴɪᴛʀᴏɢᴇɴ