Semicarbazide, among the following, is:

1. NH₂CONH₂

2. NH₂-NH₂

3. NH₂CONHNH₂

4. None of the above

Aniline when diazotised in cold and then treated with dimethylaniline, gives a coloured product. It's structure would be :                                                                             

1.
 

2. 
 

3. 
 

4. 

Name the end product in the following series of reactions,

CH₃COOH $\stackrel{{\mathrm{NH}}_3}{\to }$A$\stackrel{∆}{\to }$B$\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }$C:

(a) CH₄                                         (b) CH₃OH

(c) acetonitrile                               (d) ammonium acetate

The type of isomerism shown by C₆H₅CN and C₆H₅NC is:

(a) position

(b) functional

(c) enantiomerism

(d) tautomerism

An organic compound A on reduction gives compound B which on reaction with chloroform and potassium hydroxide forms C. The compound C on catalytic reduction gives N-methylaniline. The compound A is                                                                                      [2000]

(a) nitrobenzene

(b) nitromethane

(c) methylamine

(d) aniline

An aromatic primary amine with cold nitrous acid leads to the formation of:

(a) alcohol

(b) nitrite

(c) diazonium salt

(d) benzene

Product P in the above reaction is 

[2002]

In the reaction sequence:

${\mathrm{CH}}_3\mathrm{CN}+2\mathrm{H}\underset{{\mathrm{SnCl}}_2}{\overset{\mathrm{HCl}}{\to }}X \stackrel{\mathrm{Boiling} {\mathrm{H}}_2\mathrm{O}}{\to } Y,$
What is the compound Y?

1. Acetone

2. Ethanamine

3. Acetaldehyde

4. Dimethyl amine

X and Y in the given reaction are:

(a) ${\mathrm{CH}}_3\mathrm{COOH} + ({\mathrm{CH}}_3{)}_2\mathrm{NH}$

(b) ${\mathrm{CH}}_3{\mathrm{CONH}}_2 + {\mathrm{CH}}_3\mathrm{OH}$

(c) ${\mathrm{CH}}_3\mathrm{CHO} + ({\mathrm{CH}}_3{)}_2\mathrm{NH}$

(d) ${\mathrm{CH}}_3{\mathrm{COCH}}_3 + {\mathrm{CH}}_3{\mathrm{NH}}_2$

Which of the following statements about primary amines is false ?

[2010]

(1) Alkyl amines are stronger bases than aryl amines

(2) Alkyl amines react with nitrous acid to produce alcohols

(3) Aryl amines react with nitrous acid to produce phenols

(4) Alkyl amines are stronger bases than ammonia