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प्रश्न
How can urea be detected by the Biuret test?
टीपा लिहा
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उत्तर
Detection of urea by biuret test :
When urea is heated to a temperature above 405 K, ammonia is evolved and crystalline biuret is formed.
\[\begin {array}{cc}
\ce{2NH2CONH2→[More than 405K]\\\phantom{.......}\ce{O}\\
\phantom{.......}||\\ H2N-C-NH-CO=NH2 + NH3}\\
\end{array}\] biuret
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Acid Derivatives - Urea Preparation (By Wohler'S Synthesis)
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