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

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$NH_2NH_2$

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(A) The 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 $(Na)$ to convert the elements present into their corresponding water-soluble sodium salts. For nitrogen,the reaction is: $Na + C + N \rightarrow NaCN$. $NH_2NH_2$ (hydrazine) is an organic compound containing nitrogen,which upon fusion with sodium forms $NaCN$,thus giving a positive Lassaigne's test. $NaNO_3$ and $NH_4Cl$ are inorganic compounds and do not contain carbon,which is required to form $NaCN$. $NaCN$ is already a salt and does not represent the organic compound being tested.

Which of the following substances will give the Lassaigne's test for nitrogen?

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