Q. No.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
1. III < I < II
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
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. |
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. |  |
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. |
The number of structural isomers possible from the molecular formula C3H9N is?
1. Four (4)
2. Five (5)
3. Two (2)
4. Three (3)
Mark the reaction that does not yield aniline from the given options:
| 1. | Hydrolysis of phenyl isocyanide with an acidic solution |
| 2. | Degradation of benzamide with bromine in alkaline solution |
| 3. | Reduction of nitrobenzene with H2/Pd in ethanol |
| 4. | Treatment of potassium salt of phthalimide with chlorobenzene followed by hydrolysis in an aqueous NaOH solution |
What is the name of the following reaction?
1. Friedel-Crafts reaction
2. Perkins reaction
3. Acetylation reaction
4. Schotten-Baumann reaction
What results from the electrolytic reduction of nitrobenzene in a highly acidic medium?
1. p-Aminophenol
2. Azoxybenzene
3. Azobenzene
4. Aniline
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