The product (C) in the below mentioned reaction is:
 \(\xrightarrow[]{{(NH_4)}_2S}\ A\ \xrightarrow[0-5\ ^\circ C]{NaNO_2/HCl}\ B \xrightarrow[\Delta]{C_2H_5OH}\ C\)

1. Nitrobenzene

2. 1,3-Diethoxybenzene

3. Ethoxybenzene

4. Benzene

$\stackrel{{\mathrm{NaNO}}_2\left(\mathrm{aq}\right)+\mathrm{HCl}}{\to }$(A)

The major product (A) is 

1. 

2. 

3. 

4. None of these

Hydrolysis of alkyl isocyanide yields

1. Primary Amine

2. Tertiary Amine

3. Alcohol

4. Aldehyde

Which compound from the following options cannot be synthesised using the Gabriel phthalimide synthesis method?

1.		2.	(CH3)2CH-NH2
3.		4.	EtNH2

Consider the following sequence of reactions

Compound[A]$\stackrel{\mathrm{Reduction}}{\to }$[B] $\stackrel{{\mathrm{HNO}}_2}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$ The compound [A] is

1. CH₃CH₂CN

2. CH₃NO₂

3. CH₃NC

4. CH₃CN

Primary, secondary and tertiary nitroalkanes can be identifier by the action of:

1. ${\mathrm{HNO}}_2 + \mathrm{NaOH}\left(aq\right)$

2. ${\mathrm{CHCl}}_3 + \mathrm{NaOH} \left(aq\right)$

3. ${\mathrm{CHCl}}_3 + \mathrm{KOH}(\mathrm{alc}.)$

4. none of these

Considering the basic strength of amines in aqueous solution, which one has the least basic

1. $({\mathrm{CH}}_3{)}_2\mathrm{NH}$

2. ${\mathrm{CH}}_3{\mathrm{NH}}_2$

3. $({\mathrm{CH}}_3{)}_3\mathrm{N}$

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

What is the decreasing order of the basicity of $1°, 2° \mathrm{and} 3°$ ethyl amines and ammonia in aqueous medium is:

1. ${\mathrm{NH}}_3>{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2>({\mathrm{C}}_2{\mathrm{H}}_5{)}_2\mathrm{NH}>({\mathrm{C}}_2{\mathrm{H}}_5{)}_3\mathrm{N}$

2. $({\mathrm{C}}_2{\mathrm{H}}_5{)}_3\mathrm{N}>({\mathrm{C}}_2{\mathrm{H}}_5{)}_2\mathrm{NH}>{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2>{\mathrm{NH}}_3$

3. $({\mathrm{C}}_2{\mathrm{H}}_5{)}_2\mathrm{NH}>{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2>({\mathrm{C}}_2{\mathrm{H}}_5{)}_3\mathrm{N}>{\mathrm{NH}}_3$

4. $({\mathrm{C}}_2{\mathrm{H}}_5{)}_2\mathrm{NH}>({\mathrm{C}}_2{\mathrm{H}}_5{)}_3\mathrm{N}>{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2>{\mathrm{NH}}_3$

On hydrolysis, what do primary nitroalkanes give?

1. RCOOH + NH₂OH

2. RCOOH

3. NH₂OH

4. RCOR

Primary, Secondary and tertiary amines may be separated by using-

1. Ethanoyl chloride

2. Diethyl oxalate

3. Thionyl chloride

4. None of the above