$({\mathrm{NH}}_4{)}_2{\mathrm{SO}}_4 + \mathrm{KCNO}$ upon heating generates -

1. Nitrogen gas

2. Carbon dioxide

3. Biuret

4. Ammonium carbonate

Mark the correct statement:

(1) Methylamine is slightly acidic

(2) Methylamine is less basic than ammonia

(3) Methylamine ia a stronger base than ammonia

(4) Methylamine forms salts with alkalies

A colourless organic compound gave brisk effervescence with a mixture of NaNO₂ and dil.HCl. It could be:

(1) glucose

(2) oxalic acid

(3) urea

(4) benzoic acid

Aliphatic amines are soluble in water because:

(1) they are basic

(2) they are amino compounds

(3) they are lighter than water

(4) of formation of hydrogen bonds with water

Which nitro compound will show tautomerism ?

(1) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2$

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

(3) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NO}}_2$

(4) o-nitrotoluene

Which of the following reagents will convert nitromethane into methylamine ?

1. Zn/HCl

2. Zn/NaOH

3. Zn/C₂H₅OH

4. Ni/H₂

Nitrobenze on reduction with Al-Hg and water gives:

(1) azobenze

(2) aniline

(3) azoxy benzene

(4) phenylhydroxylamine

The reduction of CH₃CN to CH₃CH₂NH₂ is called:

1. Rosenmund's reduction

2. Clemmensen's reduction

3. Mendius reduction

4. Hofmann's reduction

Aniline and ethylamine resembles in:

(1) solubility

(2) action with HNO₂

(3) action of Grignard reagent

(4) coupling reaction

Mendius method of preparation of amines consists of: 

(1) catalytic reduction of alkyl cyanides

(2) reduction of amide with LiAlH₄ 

(3) reduction of nitroparaffin with Sn + HCl

(4) reduction of oximes with Na + C₂H₅OH