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Question
Which of the following species are involved in the carbylamine test?
(i) \[\ce{R - NC}\]
(ii) \[\ce{CHCl3}\]
(iii) \[\ce{COCl2}\]
(iv) \[\ce{NaNO2 + HCl}\]
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Solution
(i) \[\ce{R - NC}\]
(ii) \[\ce{CHCl3}\]
Explanation:
Carbylamine reaction: Amine on reaction with a mixture of \[\ce{CHCl3}\] and \[\ce{KOH}\] produces alkyl isocyanate.
\[\ce{R-NH2 + CHCl, + 3KOH ->[Heat] RNC + 3KCl + 3H2O}\] Only \[\ce{RNC}\] and \[\ce{CHCl3}\] are involved in carbylamine reaction.
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