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^-

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2\stackrel{\mathrm{Fe}/\mathrm{HCl}}{\to }\mathrm{A}\underset{273<mspace\; width="1em"></mspace>\mathrm{K}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}\mathrm{B}\underset{283<mspace\; width="1em"></mspace>\mathrm{K}}{\overset{{\mathrm{H}}_2\mathrm{O}}{\to }}\mathrm{C}$ 'C' is 

1. ${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{OH}$

2. ${\mathrm{C}}_6{\mathrm{H}}_5-{\mathrm{CH}}_2\mathrm{OH}$

3. ${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{CHO}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2$

Identify the product formed from the reaction of nitrobenzene with conc. HNO₃/H₂SO₄ at 80-100°C:
1. 1,4-Dinitrobenzene 
2. 2,4,6-Trinitrobenzene
3. 1,2-Dinitrobenzene 
4. 1,3-Dinitrobenzene

Which of the following compounds is most basic here

1. diphenyl amine

2. dimethyl amine

3. guanidine

4. trimethyl amine

Whose melting point is the highest?