A method for the identification of primary, secondary and tertiary amines is -

1. Azo-dye test

2. Carbylamine test

3. Hinsberg’s test

4. None of these

The primary amine is -

1. ${\left({\mathrm{CH}}_3\right)}_2{\mathrm{CHNH}}_2$

2. ${{\mathrm{CH}}_3\left({\mathrm{CH}}_2\right)}_2\mathrm{NH}-{\mathrm{CH}}_3$

3. ${{\mathrm{CH}}_3\left({\mathrm{CH}}_2\right)}_2\mathrm{N}{\left({\mathrm{CH}}_3\right)}_2$

4. None of the above

Which of the following is a secondary amine is -

$1. {\mathrm{CH}}_3{\left({\mathrm{CH}}_2\right)}_2{\mathrm{NH}}_2$
$2. {\left({\mathrm{CH}}_3{\mathrm{CH}}_2\right)}_2{\mathrm{NCH}}_3$
$3. {\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NHCH}}_3$
$4. {\left({\mathrm{CH}}_3\right)}_3{\mathrm{NH}}_2$

The tertiary amine is-

$1. {\left({\mathrm{CH}}_3{\mathrm{CH}}_2\right)}_2{\mathrm{NCH}}_3$
$2. {\left({\mathrm{CH}}_3\right)}_3{\mathrm{NH}}_2$
$3. \mathrm{m}-{\mathrm{BrC}}_6{\mathrm{H}}_4{\mathrm{NH}}_2$
$4. \mathrm{None} \mathrm{of} \mathrm{these}$

The chemical test used to distinguish between aniline and benzylamine is-

1. Nitrous acid.

2. Reduction Reaction

3. Hinsberg reagent

4. None of above

The chemical test used to distinguish between aniline and N-methyl aniline is-

1. Carbylamine test 

2. Hoffmann bromamide reaction

3. Acetylation

4. None of above

The chemical test used to distinguish between methylamine and dimethylamine is-

1. Hoffmann bromamide reaction

2. Hinsberg's reagent 

3. Carbylamine test

4. Both 2 and 3

The incorrect statement among the following is :