Chemistry/Chemistry MCQ Question - Aromatic Hydrocarbons Sample Test,Sample questions

Question:
Acetophenone is a

1.Ether

2.Ketone

3.Aldehyde

4.Ester


Question:
Benzene does not undergo

1.Substitution reaction

2.Addition reaction

3.Polymerization reactions

4.Oxidation reactions


Question:
Benzene is heated in air with V2O5 at 450?C it undergoes

1.Substitution reaction

2.Addition reaction

3.Elimination reaction

4.Oxidation reaction


Question:
Chlorination of toluene in the presence of sublight produces

1.Benzyl chloride

2.o - chlorotoluene

3.p - chlorotoluene

4.benzoic acid


Question:
During sulphonation of benzene H2SO4 generates the electrophile

1.HSO4-

2.SO2

3.SO3

4.H+


Question:
In Friedel Craft Alkylation A?C?3 is used to generate

1.Strong nucleophile

2.Weak nucleophile

3.Strong electrophile

4.Weak electrophile


Question:
Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from

1.acetylene

2.N-hexane

3.Benzene sulphonic acid

4.Sodium benzoate


Question:
Nitronium ion is

1.NO3

2.NO

3.NO2-

4.NO2+


Question:
Ozonolysis of benzene produces

1.Glycol

2.Glyoxal

3.Vicinal diol

4.Both b & c


Question:
Reacting bromine with benzene in the presence of sunlight will result in

1.The rupturing of benzene ring

2.Substitution reaction

3.Addition reaction

4.No-reaction


Question:
Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as

1.Dows process

2.Friedel & Craft acylation

3.Friedel & Craft alkylation

4.Clemmenson reduction


Question:
The heat of hydrogenation of cyclohexene is

1.?239 kJ mol-1

2.?208 kJ mol-1

3.?119.5 kJ/mol

4.?119.5 kcal/mol


Question:
The hydrolysis of Benzenetrizonide will yield three moles of

1.Glyoxime

2.Benzaldehyde

3.Glycol

4.Glyoxal


Question:
The preparation of benzene from acetylene can also be said as

1.Oxidation

2.Polymerization

3.Dehydration

4.Condensation


Question:
The resonance energy of benzene is

1.150.5 kJ/mol

2.250.5 kJ/mol

3.150.5 Cal/mol

4.250.5 Cal/mol


Question:
What catalyst is employed when benzene is prepared from acetylene at 70?C?

1.Cr2O3 + A?2O3 + SiO2

2.Raney nickel

3.Organo-nickel

4.Ni 250 - 300?C


Question:
What is required other than anhydrous A?C?3 when toluene is prepared by Friedal craft reaction?

1.C6H6

2.C6H6 + CH3C?

3.C6H5C2H5

4.C6H5C? & CH3Cl


Question:
What is the molecular formula of Benzenetriozonide?

1.C6H6O9

2.C6H5O8

3.C6H5O9

4.C6H6O6


Question:
Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7

1.Toluene

2.Ethyl benzene

3.n-propyl benzene

4.All


Question:
Which compound will readily undergo sulphonation?

1.Benzene

2.Nitro benzene

3.Toluene

4.Chlorobenzene


Question:
Which is fused cyclic aromatic compound

1.diphenyl amine

2.diphenyl methane

3.naphthalene

4.biphenyl


Question:
Which one of the following is benzal chloride?

1.C6H5 CH2C?

2.C6H5 CHC?2

3.C6H5 -CH = CHC?

4.None of the above


Question:
Which one of the following methods will not give benzene?

1.Heating sod. Salt of Benzoic acid with soda lime

2.Distilling phenol with Zn dust

3.Chlorobenzene with NaOH at 360?C & 150atm.

4.Hydrolysis of benzene sulphonic acid with super heated steam.


Question:
Which one of the following radical is called benzyl radical?

1.C6H5?

2.C6H5?C

3.C6H5?CH-

4.C6H5?CH2-


Question:
Which one of the following statement is not correct about benzene?

1.On hydrogenation 208 KJ/mole is liberated

2.C-H bond length in benzene is 1.09 A?

3.Molecular mass of benzene is 78.108

4.Resonance energy of benzene is 150.5 K Cal/mole


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