Synthesis by Reduction of Nitro Compounds

Q. Nitroethane on reduction with $Sn/HCl$ gives:

1. $C_2{H}_6$
2. $C_2{H}_{5}N{H}_2$
3. $C_2{H}_{5}OH$
4. None of the above

Q. Amine that cannot be prepared by Gabriel phthalimide synthesis is:

1. aniline
2. benzylamine
3. methylamine
4. iso-butylamine

Q.

Which of the following amine liberates nitrogen gas on reaction with HNO₂ ?

1. C₆H₅ NH₂

2. CH₃NH₂

3. (CH₃)₃ N

4. (CH₃)₂NH

Q. What is the product formed when nitrobenzene is treated with Zn-Dust and Ammonium Chloride?

1. Benzene
2. Aniline
3. Azoxybenzene
4. Phenyl hydroxylamine

Q. An orange dye p-hydroxyazobenzene can be synthesized from benzene diazonium chloride by

1. Sandmeyer reaction
2. Coupling reaction
3. Gattermann reaction
4. Friedal craft reaction

Q.

An organic compound 'A' reacts with Sodium metal and forms 'B'. On heating with conc.H₂SO₄, A gives diethyl ether. A and B respectively.

1. C₂H₅OH and C₂H₅ONa

2. C₃H₇OH and CH₃ONa

3. CH₃OH and CH₃ONa

4. C₄H₉OH and C₄H₉ONa

Q. For the reaction C2H5OH + HX = C2H5X catalyst is ZnX2 . The order of reactivity is 1 HI>HCl>HBr 2. HCl>HBr>HCl 3. Hbr>HI>HCl 4.none

Q.

Which of the following does not disproportionate?

1. ${\mathrm{BrO}}^{-}$

2. ${{\mathrm{BrO}}_2}^{-}$

3. ${{\mathrm{BrO}}_3}^{-}$

4. ${{\mathrm{BrO}}_4}^{-}$

Q. What is the correct reactivity order of alkyl halides towards ammonolysis ?

1. $RI>RBr>RCl$
2. $RBr>RCl>RI$
3. $RCl>RBr>RI$
4. $RI>RCl>RBr$

Q.

Aqua regia releases nascent ______.

Q. \(P\) and \(Q\) are isomers of dicarboxylic acid \(C_4H_4O_4\). Both decolorize \(Br_2/H_2O\). On heating, \(P\) forms the cyclic anhydride.
Upon treatment with dilute alkaline \(KMnO_4, P\) as well as \(Q\) could produce one or more than one from \(S, ~ T\) and \(U.\)

\( S \) \( T \) \( U \)

Q. 19. Reaction of phenol with PBr3? With mechanism and through which path does it go through

Q. Which of the following reagents cannot be used for the conversion of nitrobenzene to aniline?

1. $H_2/\mathrm{Pd}\mathrm{in}\mathrm{ethanol}$
2. $\mathrm{Fe}+\mathrm{HCl}$
3. $\mathrm{Zn}/{\mathrm{NH}}_4\mathrm{Cl}$
4. ${\mathrm{HNO}}_3+H_2{\mathrm{SO}}_4$

Q.

Which among the following reactions does not yield an amine ?

1. 
   

2. 
   

3. 
   

4. 
   

Q. An organic acid P $C_{11}{H}_{12}{O}_2$ can easily be oxidized to a dibasic acid which reacts with ethylene glycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S.

The compound R is :

1. 
2. 
3. 
4. 

Q.

The best sequence of reaction to prepare 3 - chloro aniline from benzene is

1. Nitration, reduction, acylation , chlorination, hydrolysis

2. Nitration, Chlorination, reduction

3. Nitration, reduction, chlorination

4. Chlorination, nitration reduction

Q. What happen when DIBAL react with aldehyde

Q. Nitroparaffins on reduction give:

1. Amides
2. Alkylamines
3. Ammonium salts
4. Acetanilides
   

Q. What will be the product obtained when nitrobenzene is treated with zinc dust and ammonium chloride?

1. Benzylamine
2. Aniline
3. 3-Nitroaniline
4. N-phenylhydroxylamine

Q. How Aniline is obtained from Nitrobenzene?

Q. Cl2 gas is obtained by various reactions but not by:(1)KMnO4+conc. HCl (2) KCI + K2Cr2O7+ conc. H2SO4 (3) MnO2+ conc. HCI (4) KCI +F2

Q. Which of the following reactants on reaction with conc. $NaOH$ followed by acidification gives following lactone as the main product?

1. 
2. 
3. 
4. 

Q. The solvent used in Wurtz reactions is:

1. $C_2{H}_{5}OH$
2. $C{H}_{3}COOH$
3. $H_{2}O$
4. $C_2{H}_{5}O{C}_2{H}_5$ (dry)

Q. The herbicide propanil, shown below, is synthesized commercially from chlorobenzene. Which sequence of reactions would be the most effective for carrying out this synthesis?

1. Chlorination, nitration, reduction, acylation
2. Nitration, chlorination, reduction, acylation
3. Nitration, reduction, chlorination, acylation
4. Chlorination, reduction, nitration, acylation

Q.

Write a short note on the oxidising properties of nitric acid.

Q. In benzaldehyde and propanal, which one is more reactive towards nucleophilic addition reaction.give reasons

Q. Which of the following is the strongest base?

1. 
2. 
3. 
4. 

Q. Nitrobenzene on reduction with Zn dust and aqueous $N{H}_{4}Cl$ forms :

1. $C_6{H}_{5}N{H}_2$
2. $C_6{H}_{5}NO$
3. $C_6{H}_{5}N=N{C}_6{H}_5$
4. $C_6{H}_{5}NHOH$

Q. The total number of amines among the following which can be synthesized by Gabriel synthesis is


$C{H}_{3}C{H}_{2}N{H}_2$

Q. the reaction of chloroform with alcoholic KOH &p toludine forms