Which nitro derivative of haloarene is most reactive towards nucleophilic substitution reaction?

1.

 

2.

 

3.

 

4.

 

Debromination of meso-dibromobutane gives mainly

1. n-butane

2. 1-butene

3. Cis-2-butene

4. Trans-2-butene

The products of reaction of alcoholic silver nitrite with ethyl bromide are :

1. Ethane

2. Ethene

3. Ethyl alcohol

4. Nitroethane

Identify (Z) in the following reaction sequence:

C₂H₅I $\underset{\mathrm{KOH}}{\overset{\mathrm{Alcoholic}}{\to }}$(X) $\underset{}{\overset{{\mathrm{Br}}_2}{\to }}$(Y) $\stackrel{\mathrm{KCN}}{\to }$(Z):

1. CH₃-CH₂-CN     

2. $\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}-\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}$

3. $\underset{Br}{\underset{|}{{\mathrm{CH}}_2}}-\underset{\mathrm{CN}}{\underset{|}{{\mathrm{CH}}_2}}$     

4. $\underset{\mathrm{CN}}{\underset{|}{\mathrm{CH}}}=\underset{\mathrm{CN}}{\underset{|}{\mathrm{CH}}}$

The alkyl halide which does not give a white precipitate with an alcoholic ${\mathrm{AgNO}}_3$solution is-

1. Ethyl chloride                     

2. Allyl chloride

3. Isopropyl chloride               

4. Vinyl chloride

Identify 'Z' in the following reaction series,

${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Br} \stackrel{\mathrm{aqueous} \mathrm{NaOH}}{\to }\left(X\right) \underset{\mathrm{Heat}}{\overset{{\mathrm{Al}}_2{\mathrm{O}}_3}{\to }} \left(Y\right) \stackrel{\mathrm{HOCl}}{\to }\left(Z\right)$:

1. mixture of 

2. 

3. 

4.

Addition of Br₂ on cis-butene-2 gives:

1. A racemic mixture of 2,3-dibromobutane

2. Meso form of 2,3-dibromobutane

3. Dextro form of 2,3-dibromobutane

4. Laevo form of 2,3-dibromobutane 

Chlorobenzene reacts with Mg in dry ether to give a compound (A) which further reacts with ethanol to yield                                                                                                       

1. Phenol                           2. Benzene

3. Ethyl benzene                 4. Phenyl ether

P-chloro toulene is reacted with liquid ${\mathrm{KNH}}_2$ then the product formed is

1. o-toulidine

2. m-toluidine

3. p-toluidine

4. Both (1) & (3)

Arrange the following in the order of C-Br bond strength in a polar solvent

1. I<II<III<IV

2. III<IV<I<II

3. IV<III<II<I

4. II<I<III<IV