Primary, secondary and tertiary nitroalkanes can be identifier by the action of:

1. ${\mathrm{HNO}}_2<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{NaOH}\left(aq\right)$

2. ${\mathrm{CHCl}}_3<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{NaOH}<mspace\; width="1em"></mspace>\left(aq\right)$

3. ${\mathrm{CHCl}}_3<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>\mathrm{KOH}(\mathrm{alc}.)$

4. none of these

Consider the following sequence of reactions

Compound[A]$\stackrel{\mathrm{Reduction}}{\to }$[B] $\stackrel{{\mathrm{HNO}}_2}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$ 

The compound [A] is

1. CH₃CH₂CN

2. CH₃NO₂

3. CH₃NC

4. CH₃CN

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

When NaNO₂ and dilute HCl were added to an amine at $0°\mathrm{c}$, a colourless gas was evolved and an ionic compound is formed. The amine is:

1. any primary amine

2. an aromatic primary amine

3. any amine

4. none of the above

The compound obtained by heating a mixture of primary amine and chloroform with ethanolic potassium hydroxide (KOH) is

[1997]

1. An alkyl isocyanide

2. An alkyl halide

3. An amide

4. An amide and nitro compound

Identify 'Z' in the change;

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2\underset{280\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}\mathrm{X}\stackrel{\mathrm{CuBr}/\mathrm{HBr}}{\to }\mathrm{Z}:$




 

1.
2.
3.
4.

1.  

2. 

3. 

4.  

Among the following, the strongest base is:

1. C₆H₅NH₂

2. p-NO₂-C₆H₄NH₂

3. m-NO₂-C₂H₄NH₂

4. C₂H5CH₂NH₂

A nitrogenous substance X is treated with HNO₂ and the product so formed is further treated with NaOH solution, which produces blue colouration. X can be:

1. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2$

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NO}}_2$

3. ${\left({\mathrm{CH}}_3\right)}_2\mathrm{C}(\mathrm{N}=\mathrm{O})\left({\mathrm{NO}}_2\right)$

4. ${(\mathrm{CH}}_{}$₃)2CHNO2

Alkanamide that gives 1-phenylethylamine on Hoffmann's reaction is:

1. 2-Phenylpropanamide

2. 3-Phenylpropanamide

3. 2-Phenylethanamide

4. N-Phenylethanamide

The IUPAC name of the given comound is -

1. 1-Methyl-aminopropane

2. Butan-2-amine

3. 2-Methyl-2-aminopropane

4. None of the above