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

Which of the following amines is optically active?

(1) ${\mathrm{CH}}_3{\mathrm{NH}}_2$

(2) ${\mathrm{CH}}_3{\mathrm{NHCH}}_3$

(3) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2-\stackrel{\stackrel{{\mathrm{CH}}_3}{|}}{\mathrm{N}}-{\mathrm{C}}_2{\mathrm{H}}_5$

(4) Sec. butylamine

The number of $\mathrm{\pi }$-bonds in the formula given below, NC-CH=CH-CN are:

(1) 5

(2) 4

(3) 3

(4) 2

The product yield from the reaction of a ketone and $1°$ amine is:

1. Amides

2. Oximes

3. Urea

4. Imines

The compound formed when malonic ester reacts with urea is:

(1) cinnamic acid

(2) butyric acid

(3) barbituric acid

(4) crotonic acid

Ethylamine reacts with nitrosyl chloride (NOCl) to form:

(1) ethyl chloride

(2) ethyl alcohol

(3) ethyl nitrite

(4) nitroethane

Which compound will liberate CO₂ from NaHCO₃ solution?

(1) CH₃CONH₂

(2) CH₃NH₂

(3) (CH₃)₄N⁺OH^-

(4) CH₃N⁺H₃Cl^-