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NEET CHEMISTRYAminesEasy

Question

The compound obtained by heating a mixture of primary amine and chloroform with ethanolic potassium hydroxide (KOH) is:

A

An alkyl isocyanide

B

An alkyl halide

C

An amide

D

An amide and nitro compound

Step-by-Step Solution

When a primary amine (aliphatic or aromatic) is heated with chloroform (CHCl3CHCl_3) and ethanolic potassium hydroxide (KOHKOH), it undergoes the Carbylamine reaction to form an isocyanide (or carbylamine). This product is characterized by a highly offensive or foul smell. This reaction serves as a specific qualitative test for primary amines, as secondary and tertiary amines do not undergo this reaction.

The general chemical equation is: R−NH2+CHCl3+3KOH→ΔR−NC+3KCl+3H2OR-NH_2 + CHCl_3 + 3KOH \xrightarrow{\Delta} R-NC + 3KCl + 3H_2O Where R−NCR-NC represents an alkyl (or aryl) isocyanide.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Amines. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAminescompoundobtainedheatingmixtureprimary

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The products formed when Aniline reacts with $Br_2$ water, and $NaNO_2/HCl$ will be, respectively:

A.p-Bromoaniline; p-Chloroaniline
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C.2,4,6-Tribromoaniline; Benzenediazonium chloride
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Aniline gives a set of the following reactions that yielded a coloured product 'Y'. The structure of 'Y' is: (Note: Reaction scheme is missing from the provided text)

A.Option 1
B.Option 2
C.Option 3
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A.Option 1
B.Option 2
C.Option 3
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What results from the electrolytic reduction of nitrobenzene in a highly acidic medium?

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The reagent required to convert acetamide into methyl amine is:

A.$NaOH/Br_2$
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Which of the following statements about primary amines is false?

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What is the correct order of the methyl-substituted amines' basic strength in an aqueous solution?

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