A colourless organic compound gave brisk effervescence with a mixture of ${\mathrm{NaNO}}_2$ and dil. HCl. It could be:

(1) glucose 

(2) oxalic acid

(3) urea 

(4)benzoic acid

Identify X in the sequence,

X $\stackrel{{\mathrm{HNO}}_2}{\to }$ C₃H₈O $\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7}{\to }}$ C₃H₆O₂

(1) CH₃-NH-CH₂-CH₃

(2) CH₃-CH₂-CH₂-NH₂

(3) (CH₃)₃N

(4) none of the above

Aliphatic amines are ......basic than ${\mathrm{NH}}_3$ but aromatic amines are .....basic than ${\mathrm{NH}}_3$

(1) more, less

(2) less, more

(3) both (a) and (b) 

(4) none of these

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.

The general formula of quaternary ammonium compound  is:

(1) R-NH₂

(2) R₃N

(3) [R₄N]⁺X^-

(4) NH₄X

Amines have:

1. garlic odour

2. fishy odour

3. jasmine odour

4. bitter almonds odour

Aqueous solution of urea is:

1. Acidic

2. Alkaline

3. Almost neutral

4. Amphoteric

Urea is not used:

1. As fertilizer

2. In the manufacture of plastic

3. In the preparation of medicines

4. In the purification of water

Nitroparaffins on reduction give:

1. Amide

2. Alkylamine

3. Ammonium salt

4. Acetanilide

Which of the following is not a nitro derivative?

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

2. ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{ONO}$

3. ${\mathrm{CH}}_3\underset{\underset{{\mathrm{CH}}_3}{|}}{\mathrm{C}}\mathrm{H}-{\mathrm{N}}_{{\searrow }_{\mathrm{O}}}^{{=}^{\mathrm{O}}}$

4. ${\mathrm{C}}_6{\mathrm{H}}_4\left(\mathrm{OH}\right){\mathrm{NO}}_2$