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  4. Compound that will give positive Lassaigne's test for both nitrogen and halogen is:

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Q. Compound that will give positive Lassaigne's test for both nitrogen and halogen is:

JEE MainJEE Main 2023Organic Chemistry – Some Basic Principles and Techniques

Solution:

$CH _3 NH _2 . HCl \xrightarrow[\text { fusion }]{ Na } NaCN$ and $NaCl$
$NaCN$ gives $+ ve$ test for nitrogen and
$NaCl$ gives +ve test for halogen