1.

H-overset(O)overset("||")(C)-NHR underset("Pyridine")overset(POCl_(3))(rarr) X+H_(2)O In this reaction X is

Answer»

`R-N=C=O`
`R-CH-N-OH`
`R-C equiv N`
`R-N overset(rarr)(=)C`

Solution :`underset("N-Alkyl FORMAMIDE")(R-NH-overset(O)overset("||")(C)-H) underset("PYRIDINE")overset(POCl_(3))(rarr) underset("Alkyl isocyanide")(R-N overset(rarr)(=)C+H_(2)O)`


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