IIT JEE/IIT JEE Chemistry Of Hydrocarbons Part 1 Sample Test,Sample questions

Question:
12-butyne when reduced with palladised charcoal with poisons like quinoline gives     

1.1-butene

2.butane

3.trans-2 butene

4.cis 2-butene


Question:
A mixture of 1-chloropropane and 2-chloropropane is treated with alcoholic KOH. The resulting mixture will have     

1.1-propene

2.2-propene

3.1-propanol

4.a mixture of 1-propene and 2-propene


Question:
A mixture of sodium butanoate and 2-methyl sodium propanoate is heated with sodalime. The resulting compound will be     

1.propane and propyne

2.a mixture of propane and 2-methyl propane

3.methane

4.propane


Question:
Acetylene can be converted into methyl vinyl ether on reaction with     

1.Vinyl alcohol

2.Methyl alcohol

3.Dimethyl ether

4.Methanal.


Question:
Alcohholic solution of caustic potash is a specific reagent for     

1.Dehydration

2.Dehydrohalogenation

3.Dehydrogenation

4.Hydration.


Question:
Alcoholic solution of caustic potash is a specific reagent for    

1.dehydro-halogenation

2.dehydrogenation

3.dehydration

4.hydration


Question:
Alkenes are isomeric with     

1.cycloalkenes

2.cycloalkanes

3.alkanes

4.alkenes


Question:
Alkyl halides gives alkenes when treated with     

1.alc KOH

2.aq KOH

3.molten KOH

4.All the above


Question:
Alkynes when reduced with sodium in liquid ammonia gives      

1.1-alkene only

2.a mixture of cis and trans

3.alkenes

4.None of them


Question:
Among the alkanes with an increase in mol wt??.     

1.m.pt. decreases

2.f.pt. decreases

3.b.pt increases

4.density decreases


Question:
An example of conjugate diene is  

1.hexadiene 1 5

2.butadiene 1 2

3.butadiene 1 3

4.pentadiene 1 4


Question:
Aromatisation is the conversion of     

1.higher hydrocarbon to lower ones

2.mixing of aromatic hydrocarbon

3.a hydrocarbon to benzene

4.None of above


Question:
Aromatisation is the conversion of    

1.higher hydrocarbon to lower ones

2.mixing of aromatic hydrocarbon

3.a hydrocarbon to benzene

4.None of above


Question:
Bromination of isobutene gives as major product     

1.n-butyl bromide

2.tert. butyl bromide

3.isobutyl bromide

4.None of the above


Question:
Cetane is      

1.n-Hexane

2.n-Octane

3.n-Pentadecane

4.n-Hexadecane.


Question:
Crude oil is a complex mixture of     

1.acids

2.alcohols

3.hydrocarbons

4.esters


Question:
Dehydrohalogenation of alkyl dihalides gives     

1.alkyl halides

2.alkynes

3.alkenes

4.alkanes


Question:
During distillation of coal tar naphthalene is a constituent of     

1.Middle oil

2.Green oil

3.Light oil

4.Heavy oil.


Question:
Ethylene when treated with bromine water gives     

1.ethyledene bromide

2.ethylene bromohydrin

3.ethylene bromide

4.methanol


Question:
In ethane each carbon atom is bonded to  

1.4 atoms

2.2atoms

3.3 atoms

4.5 atoms


Question:
In which of the following C-H bond will be smallest?     

1.Ethylene

2.Acetylene

3.Methane

4.Ethane


Question:
Iodoform can be prepared in the laboratory by the action of iodine on sodium hydroxide in the presence of     

1.formaldehyde

2.acetaldehyde

3.acetic acid

4.formic acid


Question:
isomers of butyl chloride which will undergo dehydrogenation more readily    

1.Among the different

2.tert. butyl chloride

3.sec. butyl chloride

4.n-butyl chloride


Question:
Octane number of iso-octane is  

1.Zero

2.100

3.80

4.20


Question:
Olafins means      

1.ethene

2.unsaturated

3.oil forming

4.having tripple bond


Question:
On ozonolysis and subsequent hydrolysis an alkene gave 2 molecules of formaldehyde and hydrogen peroxide. The alkene is     

1.ethylene

2.butylene

3.propylene

4.None of these


Question:
Polythene is a polymer of     

1.ethylene

2.propylene

3.isobutene

4.vinyl chloride


Question:
Propane when treated with conc. Nitric acid at 723 K gives    

1.2-nitropropane

2.1-nitropropane

3.a mixture of nitromethane nitroethane 1-

4.a mixture of nitromethane nitroethane 1-nitropropane and 2-nitropropane nitroethane and nitromethane


Question:
Sodium propionate on decarboxylation with soda-lime gives     

1.Propane

2.Ethane

3.Butane

4.Pentane.


Question:
Sodium propionate on decarboxylation with soda-lime gives     

1.Propane

2.Ethane

3.Butane

4.Pentane.


Question:
Tetraethyl lead is used as     

1.petroleum additive

2.ethylating agent

3.antrepeller

4.catalyst


Question:
The addition reaction of carbon-carbon double bonds are   free radical addition  None of the above

1.nucleophilic addition

2.free radical addition

3.electrophilic addition

4.None of the above


Question:
The formation of PVC from vinyl chloride is an example of     

1.condensation polymerisation

2.addition polymerisation

3.substitution reaction

4.None of these


Question:
The higher fraction of crude oil burn with   pinkish flame  

1.smokiest flame

2.pinkish flame

3.blue flame

4.red flame


Question:
The least substituted alkene is the major product in accordance with     

1.Vant Hoff rule

2.Wurtz reaction

3.Markounikoffs rule

4.Hoffmanns rule


Question:
The minimum temp. at which oil gives sufficient vapours to form an explosive mixture with air is known as     

1.optimum temp.

2.kindling temp.

3.flash point

4.last point


Question:
The number of isomeric pentanes is  

1.4

2.3

3.2

4.1


Question:
The reactivity of a hydrogen in an alkane depends on   carbon atoms   

1.conditions

2.carbon atoms

3.the alkane in which it is present

4.whether the hydrogen is primary secondary or tertiary


Question:
To increase the yield of gasoline from a given sample of crude oil the chemist carries out     

1.Fractiomal distillatiom

2.Hydrolysis

3.Aromatization

4.Cracking.


Question:
Vapours of ethyl alcohol when passed over phosphoric acid at 220 degreeCentigrade gives    

1. diethyl phosphate

2.methylene

3.ethyl hydrogen phosphate

4.ethylene


Question:
Vapours of n-hexane when passed over special catalysts under high pressure and temperature given benzene This process is called     

1.cyclisation

2.aromatisation

3.isomerisation

4.crystallization


Question:
When two alkenes may be formed by dehydrohalogenation of an alkyl halide the alkene which is more substituted is the major or preferred product. This generalisation is known as     .

1.Markownikoffs rule

2.Anti-Markownikoffs rule

3.Saytzeff rule

4.None of these is correct


Question:
Which of the following alkanes will undergo oxidation readily?     

1.ethane

2.iso-butane

3.iso-pentane

4.2 methyl propane


Question:
Which of the following can form metallic derivatives by the replacement of hydrogen atoms?  Ethylene   

1.Ethylene

2.Acetylene

3.Ethane

4.Methane


Question:
Which of the following has dipole moment?     

1.trans-2-butene

2.1-propene

3.cis-2-butene

4.Both A and B


Question:
Which of the following has minimum boiling point?  isopentane   both A and B

1.isopentane

2.neopentane

3.n-pentane

4.both A and B


Question:
Which of the following have maximum boiling point?     

1.n-pentane

2.isopentane

3.isohexane

4.n-hexane


Question:
Which of the following will show maximum possible isomers?     

1.Pentene

2.Pentane

3.Butane

4.Butene


Question:
With the increase in branching the boiling point     

1.decreases

2.increases

3.no regular gradation

4.remains constant


Question:
Wurtz reaction cannot be used for the preparation of     

1.alkanes containing odd no. of C-atoms

2.alkanes containing even no. of C-atoms

3.methane

4.both methane and odd no. of C-atoms


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