Lassaigne's test for nitrogen is negative for | vedclass

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Question

(A) Lassaigne's test is used to detect nitrogen,sulfur,and halogens in organic compounds. In this test,the organic compound is fused with metallic sod

Vedclass · Accepted Answer

$NH_2OH$ (Hydroxylamine)

Vedclass · Answer

(A) Lassaigne's test is used to detect nitrogen,sulfur,and halogens in organic compounds. In this test,the organic compound is fused with metallic sodium $(Na)$. If nitrogen is present,it reacts with sodium to form sodium cyanide $(NaCN)$. However,compounds that do not contain carbon along with nitrogen,or compounds where nitrogen is present in a form that does not easily form $NaCN$ upon fusion,may give a negative result. $NH_2OH$ (Hydroxylamine) does not contain carbon. Since Lassaigne's test requires the formation of $NaCN$ (which requires both $Na$ and $C$),compounds lacking carbon cannot form cyanide ions. Therefore,$NH_2OH$ gives a negative Lassaigne's test for nitrogen.

Lassaigne's test for nitrogen is negative for which compound?

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