Why does the nitration of aniline in a strongly acidic medium
result in the formation of m-nitroaniline?

1. In spite of substituents nitro group always goes to only m-position
2. In electrophilic substitution reactions amino group is meta directive
3. In absence of substituents nitro group always goes to only m-position
4. In an acidic (strong) medium aniline is present as anilinium ion
Subtopic:  Amines - Preparation & Properties |
 70%
From NCERT
NEET - 2018
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Choose the correct increasing order of basic strength of given molecules:

     (I)       (II)     (III)

1. III < I < II

2. III < II < I

3. II < I < III

4. II < III < I

Subtopic:  Amines - Preparation & Properties |
 77%
From NCERT
NEET - 2017
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Which of the following reactions is appropriate for converting acetamide to methenamine?

1. Hoffmann hypobromamide reaction

2. Stephens reaction

3. Gabriels phthalimide synthesis

4. Carbylamine reaction

Subtopic:  Amines - Preparation & Properties | Identification of Primary, Secondary & Tertiary Amines |
 79%
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 |
 76%
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 |
 70%
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 |
 82%
From NCERT
NEET - 2016
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