The nitration of aniline in a strong acidic medium results in the formation of m-nitroaniline because:

1. In spite of substituents, the nitro group always goes to only the m-position.
2. In electrophilic substitution reactions, the amino group is meta-directive.
3. In the absence of substituents, the nitro group always goes to only m-position.
4. In an acidic (strong) medium, aniline is present as an anilinium ion.
Subtopic:  Amines - Preparation & Properties |
 71%
From NCERT
NEET - 2018
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The correct increasing order of basic strength of the given molecules is:

     (I)       (II)     (III)


1. III < I < II

2. III < II < I

3. II < I < III

4. II < III < I

Subtopic:  Amines - Preparation & Properties |
 79%
From NCERT
NEET - 2017
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Mark the correct reaction among the following to convert acetamide to methenamine:

1. Hoffmann bromamide reaction

2. Stephens reaction

3. Gabriels phthalimide synthesis

4. Carbylamine reaction

Subtopic:  Amines - Preparation & Properties | Identification of Primary, Secondary & Tertiary Amines |
 81%
From NCERT
NEET - 2017
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Which of the following reactions is appropriate for converting acetamide to methanamine?

1. Hoffmann hypobromamide reaction

2. Stephens reaction

3. Gabriels phthalimide synthesis

4. Carbylamine reaction

Subtopic:  Amines - Preparation & Properties | Identification of Primary, Secondary & Tertiary Amines |
 95%
From NCERT
NEET - 2017
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A nitro-compound among the following that does not react with nitrous acid is:

1.  2.
3.   4.  
 

Subtopic:  Urea & Nitro Compound |
 75%
NEET - 2016
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A nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO2 to give an unstable compound B. On treatment with phenol, B forms a beautiful coloured compound C with the molecular formula C12H10N2O. The structure of compound A is:

1.  2.
3. 4.
 

Subtopic:  Urea & Nitro Compound |
 71%
From NCERT
NEET - 2016
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The correct statement regarding the basicity of arylamines is:

1. Arylamines are generally more basic than alkylamines because the lone-pair electrons of nitrogen are not delocalized by interaction with the aromatic ring π-electron system.
2. Arylamines are generally more basic than alkylamines because of the aryl group +I effect.
3. Arylamines are generally more basic than alkylamines because the nitrogen atom in arylamines is sp-hybridized.
4. Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π-electron system.
Subtopic:  Amines - Preparation & Properties |
 83%
From NCERT
NEET - 2016
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