Preparation of Nitro Compounds

• Which of the following is used as a reactant for the nitration of benzene to form nitrobenzene? a) HNO2 b) HNO3 c) Mixture of HNO2 AND HNO3 d) Mixture of HNO2 and H2SO4

• In Ter Meer reaction, a method of preparation of nitro compound, which of the following used as reagent? a) HNO2 b) HNO3 c) NaNO2 d) RX (alkyl halide)

• What will be the product if 1,1-halonitroalkane undergoes nucleophilic aliphatic substitution reaction in presence of ethanol? a) 1,1-dinitro dimer b) 1,2-dinitro dimer c) 1.-nitro compound d) 2-nitrocompound

• What will be the product if 1,1-halonitroalkane undergoes nucleophilic aliphatic substitution reaction in presence of potassiam hydroxide? a) 1,1-dinitro dimer b) 1,2-dinitro dimer c) 1.-nitro compound d) 2-nitrocompound

• Which of the following is not a natural occurring nitro compound? a) Chloramphenicol b) 2-Nitrophenol c) 3-Nitropropionic acid d) nitrobenzene

• Which combination of reagents used in the indicated order with benzene will give m-nitropropylbenzene? a) 1) HNO3/H2SO4, 2) CH3CH2CH2Cl/AlCl3 b) 1) CH3CH2CH2Cl/AlCl3, 2) HNO3/H2SO4 c) 1) CH3CH2COCl/AlCl3, 2) HNO3/H2SO4, 3) H2NNH2/NaOH d) 1) HNO3/H2SO4, 2) CH3CH2COCl/AlCl3, 3) H2NNH2/NaOH

• Nitration of furan using acetyl nitrate also leads to a 2,5 addition product. How can this competing process be suppressed? a) By using concentrated nitric and sulfuric acids instead of acetyl nitrate b) By carrying out the reaction at higher temperatures c) By carrying out the nitration in the presence of pyridine d) By using nitric acid instead of acetyl nitrate

• The phenomenon or process by which imine are converted into enamine is which of the following? a) Imination b) Enamination c) Amination d) Tautomerism

• Which of the following is not true about enamines? a) Enamine are derived by the condensation of an aldehyde or ketone with a primary amine b) Enamines are versatile intermediates c) Enamines are considered to be nitrogen analogs of enols d) They are tautomeric form of imine

• Enamine shows which type of behavior? a) Basic b) Electrophilic and acidic c) Nucleophilic and basic d) Nucleophilic

• What is the name of the compound formed when alkylation of enamine is followed by hydrolysis? a) Carboxylic acid b) Ketone c) Amide d) ester

• Which cyclic ketone enamine is most reactive? a) Five membered b) Six membered c) Seven membered d) Eight membered

• Compounds which have different arrangements of atoms in space while having same atoms bonded to each other are said to have a) position isomerism b) functional group isomerism c) chain isomerism d) stereoisomerism

• Which of the following can make difference in optical isomers? a) heat b) temperature c) polarized light d) pressur

• Which of the following is an alkane which can exhibit optical activity? a) Neopentane b) Isopentane c) 3–Methylpentane d) 3–Methylhexane

• What is the molecular formula for the alkane of smallest molecular weight which possesses a stereogenic center? a) C4H10 b) C5H12 c) C6H14 d) C7H16

• Which of the following statements most accurately describes the stereochemistry between the various cyclohexanes? a) Cis-1,2-dichlorocyclohexane and trans-1,2 dichlorocyclohexane rotate plane-polarized light in opposite directions, and together in equal proportions form a racemic mixture b) The diaxial and diequatorial forms of trans-1,3 dichlorohexane can be separated by their differing physical properties c) Only cis-1,4-dichlorocyclohexane is achiral due to a plane of symmetry, and cis-1,4-dichlorocyclohexane is diastereomeric to trans-1,4-dichlorocyclohexane d) The conformational isomers of trans-1,2 dichlorocyclohexane are enantiomers, which are not interconvertible, but resolvable

• How many stereoisomers of 3-bromo-2-butanol, CH3CH(OH)CHBrCH3, exist? a) 3 b) 1 c) 2 d) 4

• How many stereoisomers of 2,3-butanediol, CH3CH(OH)CH(OH)CH3, exist? a) 3 b) 4 c) 1 d) 2

• Which of the following compounds can exhibit geometrical isomerism? a) 1-Hexene b) 2-Methyl-2-Pentene c) 3-methyl-1-pentene d) 2-Hexene

• How many number of stereoisomers possible for 2, 3 pentanediol? a) 3 b) 4 c) 5 d) 6

• How many chiral stereoisomers can be drawn for CH3CHFCHFCH(CH3)2? a) 4 b) 5 c) 6 d) 7

• What is the total number of isomers, stereoisomers included, designated by the dichlorocyclopentane? a) 7 b) 6 c) 4 d) 5

• What does a polarimeter measure? a) Polarity of the substance b) Angle of rotation of an optical active compound c) Concentration of the substance d) pH of the substance