NEET 2020 · ChemistryHNO2 matchPrevious Year Question
Which of the following amines will give the carbylamine test?
Answer: (C) (C) (aniline). \textbf{Answer:} (C) Only primary amines give the carbylamine (isocyanide) test, and aniline is the only amine listed.
- A.(A) (N,N-dimethylaniline)
- B.(B) (N-ethylaniline)
- C.(C) (aniline)✓
- D.(D) (N-methylaniline)
Correct Answer
(C) (C) (aniline)
Solution & Explanation
\textbf{Answer:} (C) Only primary amines give the carbylamine (isocyanide) test, and aniline is the only amine listed. \textbf{Solution:} The carbylamine test is given ONLY by primary amines (aliphatic or aromatic). On heating with chloroform and ethanolic a primary amine forms a foul-smelling isocyanide: . Aniline (C) is a primary amine and gives the test. N-methylaniline (D) and N-ethylaniline (B) are secondary amines; N,N-dimethylaniline (A) is tertiary. None of these has the required group, so they fail the test. Hence (C).
🎯
43,000+ questions in हिंदी & English · one-tap toggle
Open →📚Practice all NEET Chemistry PYQs chapter-wise →💡Don't get it? Learn the Amines concepts →Practice NEET 2020 Chemistry — free, with instant solutions
43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.
More NEET PYQ solutions
ChemThe following two reactions give the same foul-smelling product Z. C2H5Cl ->[X] Z C2H5CONH2 ->[Br2 + NaOH] C2H5NH2 ->[CHCl3 / ethanolic KOH][ ] Z X and Z, respectively, are:ChemThe major product Z formed in the following sequence of reactions is: C2H6 ->[Cl2/UV] X ->[NH3] Y ->[(i) NaNO2/HCl][(ii) H2O] ZChemStatement I: Primary aliphatic amines react with HNO2 to give unstable diazonium salts. Statement II: Primary aromatic amines react with HNO2 to form diazonium salts which are stable even above 300 K. Choose the most appropriate answer from the options given below:ChemIdentify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.ChemThe amine that reacts with Hinsberg's reagent to give an alkali-insoluble product is:ChemThe product formed by the reaction of an aldehyde with a primary amine is:ChemThe correct order of decreasing acidity of the following aliphatic acids is:ChemWhich one of the following reactions does NOT belong to Lassaigne's test?