Mark 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
The nitration of aniline in a strong acidic medium results in the formation of 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 nitro-compound among the following that does not react with nitrous acid 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
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 results from the electrolytic reduction of nitrobenzene in a highly acidic medium?
1. p-Aminophenol
2. Azoxybenzene
3. Azobenzene
4. Aniline
The product (A) in the below-mentioned
reaction is:
1. | 2. | ||
3. | 4. |
Nitrobenzene on reaction with conc. HNO3 /H2SO4 at 80 – 100 ºC forms:
1. 1,3– Dinitrobenzene
2. 1,4–Dinitrobenzene
3. 1,2,4–Trinitrobenzene
4. 1,2–Dinitrobenzene