The amine may contain:

(1) $-{\mathrm{NH}}_2 \mathrm{gp}.$

(2) $\underset{\left|}{\overset{\right|}{\mathrm{N}}}\mathrm{H}$ gp.

(3) $-\underset{\left|}{\overset{\right|}{\mathrm{N}}}$ gp.

(4) all of these

Primary amine and secondary amine are distinguished by:

1. ${\mathrm{Br}}_2/\mathrm{KOH}$

2. HClO

3. ${\mathrm{HNO}}_2$

4. ${\mathrm{NH}}_3$

Which of the following is carbamide?

(1) ${\mathrm{CH}}_3{\mathrm{CONH}}_2$

(2) ${\mathrm{NH}}_2{\mathrm{CONH}}_2$

(3) ${\mathrm{CH}}_2\left({\mathrm{NH}}_2\right){\mathrm{CONH}}_2$

(4) $\mathrm{CO}\left(\mathrm{OH}\right){\mathrm{NH}}_2$

Reaction of primary amine with aldehydes gives:

(1) amide

(2) aldimine

(3) nitrile

(4) none of these

An amine reacts with ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_2\mathrm{Cl}$ and the product is soluble in alkali, amine is:

(1) $1°$

(2) $2°$

(3) $3°$

(4) all of these

Which of the following will give a primary amine on hydrolysis?

(1) Nitroparaffin

(2) Alkyl cyanide

(3) Oxime

(4) Alkyl isocyanate

Mark the correct statement:

(1) Methyl amine is slightly acidic.

(2) Methyl amine is less basic than ammonia.

(3) Methyl amine is a stronger base than ammonia.

(4) Methyl amine forms salts with alkali.

Which one of the following amines will not react with ${\mathrm{HNO}}_2$ acid to give nitrogen?

(1) ${\mathrm{CH}}_3{\mathrm{NH}}_2$

(2) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2$

(3) ${\mathrm{CH}}_3-\underset{\underset{{\mathrm{CH}}_3}{|}}{\mathrm{C}}\mathrm{H}-{\mathrm{NH}}_2$

(4) 

What is decreasing order of basicity of p-, s-, t-ethyl amines and ${\mathrm{NH}}_3$ in aqueous medium ?

(1) NH₃>C₂H₅NH₂>(C₂H₅)₂NH>(C₂H₅)₃N

(2) (C₂H₅)₃N>(C₂H₅)₂NH>C₂H₅NH₂>NH₃

(3) (C₂H₅)₂NH>C₂H₅NH₂>NH₃>(C₂H₅)₃N

(4) (C₂H₅)₂NH>(C₂H₅)₃N>C₂H₅NH₂>NH₃

Urea on heating with ethanol gives:

1. Urethane

2. Urea alcohol

3. Ureides

4. None of the above