Q. No.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
Nitration of aniline in strongly acidic medium also gives m-nitroaniline because:
| 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 |
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. 4
2. 5
3. 2
4. 3
Aniline cannot be prepared by:
| 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
Among the following, which diazonium salt is the most stable?
1. \(CH_{3}N_{2}^{+}X^{-}\)
2. \(C_{6}H_{5}N_{2}^{+}X^{-}\)
3. \(CH_{3}CH_{2}N_{2}^{+}X^{-}\)
4. \(C_{6}H_{5}CH_{2}N_{2}^{+}X^{-}\)
© 2023 GoodEd Technologies Pvt. Ltd.