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NEET CHEMISTRYAminesMedium

Question

The products formed when Aniline reacts with Br2Br_2 water, and NaNO2/HClNaNO_2/HCl will be, respectively:

A

p-Bromoaniline; p-Chloroaniline

B

2,4,6-Tribromoaniline; p-Chloroaniline

C

2,4,6-Tribromoaniline; Benzenediazonium chloride

D

p-Bromoaniline; Benzenediazonium chloride

Step-by-Step Solution

  1. Reaction with Bromine water: Aniline is highly reactive towards electrophilic aromatic substitution due to the strong activating effect (+R effect) of the −NH2-NH_2 group. When treated with bromine water, it undergoes rapid polyhalogenation to form a white precipitate of 2,4,6-tribromoaniline.
  2. Reaction with Nitrous Acid (NaNO2/HClNaNO_2/HCl): Primary aromatic amines like aniline react with nitrous acid (prepared in situ from sodium nitrite and mineral acid like HClHCl) at cold temperatures (273-278 K) to form benzenediazonium chloride. This important reaction is known as diazotisation.

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.

CHEMISTRYAminesproductsformedanilinereactsnanohcl

More Amines Questions

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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
D.Option 4
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The structure of C in the below-mentioned reaction is: (Note: Reaction scheme is missing from the provided text)

A.Option 1
B.Option 2
C.Option 3
D.Option 4
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What results from the electrolytic reduction of nitrobenzene in a highly acidic medium?

A.p-Aminophenol
B.Azoxybenzene
C.Azobenzene
D.Aniline
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The reagent required to convert acetamide into methyl amine is:

A.$NaOH/Br_2$
B.Sodalime
C.Hot conc. $H_2SO_4$
D.$PCl_5$
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D is N-methyl aniline in the given below sequence of reaction: $A \xrightarrow{\text{reduction}} B \xrightarrow{CHCl_3/KOH} C \xrightarrow{\text{reduction}} D$. Structure of A can be:

A.Option 1 (Missing)
B.Nitrobenzene
C.CH3NH2
D.Option 4 (Missing)
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Which of the following statements about primary amines is false?

A.Alkyl amines are stronger bases than aryl amines
B.Alkyl amines react with nitrous acid to produce alcohols
C.Aryl amines react with nitrous acid to produce phenols
D.Alkyl amines are stronger bases than ammonia
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What is the correct order of the methyl-substituted amines' basic strength in an aqueous solution?

A.$CH_3NH_2 > (CH_3)_2NH > (CH_3)_3N$
B.$(CH_3)_2NH > CH_3NH_2 > (CH_3)_3N$
C.$(CH_3)_3N > CH_3NH_2 > (CH_3)_2NH$
D.$(CH_3)_2NH > (CH_3)_3N > CH_3NH_2$
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Identify the major product C formed in the following reaction sequence: [Reaction Scheme Missing]

A.Butylamine
B.Butanamide
C.$\alpha$-Bromobutanoic acid
D.Propylamine
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