thefunword.com – MCQs, Mock Tests | IIT JEE IIT JEE Chemistry Of Hydrocarbons Part 2

Acetylene can be converted into methyl vinyl ether on reaction with

1. Vinyl alcohol
2. Methyl alcohol
3. Dimethyl ether
4. Methanal.

✅ Correct Answer: 2

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

1. propane and propyne
2. a mixture of propane and 2-methyl propane
3. methane
4. propane

✅ Correct Answer: 4

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

1. optimum temp.
2. kindling temp.
3. flash point
4. last point

✅ Correct Answer: 3

A fuel having high octane number containing mainly

1. branched hydrocarbons
2. straight chain alkane
3. alkanes
4. All the above

✅ Correct Answer: 1

Propyne on reaction with aqueous chlorine gives

1. 1, 1, 2, 2-Tetrachloropropane
2. 1, 2-Dichloropropene
3. 1, 1-Dichloropropanone
4. 2, 2-dichloropropanal.

✅ Correct Answer: 3

he number of litres of air needed to burn completely 8 litres of acetylene is 100 75 90 40

1. 100
2. 75
3. 90
4. 40

✅ Correct Answer: 1

Which of the following is most acidic ?

1. Ethyne
2. Propyne
3. 1-Butyne
4. 2-Butyne.

✅ Correct Answer: 1

Electrolysis of potassium ethanoate gives

1. methane
2. propene
3. ethane
4. ethyne

✅ Correct Answer: 4

.Which of the following is linear?

1. Ethyne
2. Methane
3. Ethylene
4. Both A and C

✅ Correct Answer: 1

.Starting from benzene, toluene is prepared by

1. Reimer-Tiemann reaction
2. Friedel-Crafts acylation
3. Cannizzaros reaction
4. Kolbes reaction

✅ Correct Answer: 2

.The ozonolysis is used to locate the presence of

1. a single bond between C-C atoms
2. a double bond between C-C atoms
3. a triple bond between C and C atoms
4. None of these

✅ Correct Answer: 2

.Gas oil is the same as

1. diesel oil
2. petrol
3. kerosene oil
4. lubricating oil

✅ Correct Answer: 1

Benzene reacts with excess of cholrine in sunlight to form Hexachlorobenzene

1. Hexachlorobenzene
2. m-Dichlorobenzene
3. Chlorobenzene
4. Benzene hexzchlorode.

✅ Correct Answer: 4

Which of the following can form metallic derivatives by replacement of H-atoms ?

1. Ethene
2. Methane
3. 2-Butyne
4. 1-Pentyne.

✅ Correct Answer: 4

When HCl is passed through propene in the presence of benzoyl peroxide, it gives

1. n-Propyl chloride
2. iso-Propyl chloride
3. Allyl chloride
4. No reaction.

✅ Correct Answer: 2

2, 3-Dibromobutane, when heat with zinc dust, yields .

1. 2-Butene
2. 2-Butyne
3. 1-Butene
4. Butane

✅ Correct Answer: 1

An example of conjugated diene is

1. 1, 4-Pentadiene
2. 1, 5-Hexadiene
3. 1, 2-Butadiene
4. 1, 3-Pentadiene.

✅ Correct Answer: 4

.Which of the following compounds has the highest boiling point?

1. n-Hexane
2. n-Pentane
3. 2, 2-Dimethylpropane
4. 2-Methylbutane

✅ Correct Answer: 1

Allylic bromination of an olefin is

1. Nucleophilic substitution
2. Electrophilic substitution
3. Free radical substitution
4. Electrophilic addition.

✅ Correct Answer: 3

Addition of HCl to vinyl chloride gives 1, 1-dichlorocthane because of None of these.

1. Inductive effect of Cl
2. Mesomeric effect of Cl
3. Restricted rotation around double bond
4. None of these.

✅ Correct Answer: 2

Gasoline contains hydrocarbons in the rane C-7 to C-12

1. C-7 to C-12
2. C-12 to C-15
3. C-4 to C-6
4. C-5 to C-8.

✅ Correct Answer: 1

Which one of the following has the smallest heat of hydrogenation per mole? cis-2Butene

1. 1-butene
2. trans-2-Butene
3. cis-2Butene
4. 1, 3-Buteadiene.

✅ Correct Answer: 4

Propene + HBr gives

1. 1, 3-Dibromopropane
2. 2-Bromopropane
3. 1-Bromo propane
4. 1, 2-Dibromopropane.

✅ Correct Answer: 2

Which of the following is most acidic ? Methane Ethylene .

1. Methane
2. Ehtane
3. Ethylene
4. Acatylene

✅ Correct Answer: 4

Which of the following derivatives of benzene would undergo nitration most readily?

1. Nitrobenzene
2. Chlorobenzene
3. Toluene
4. Benzoic acid.

✅ Correct Answer: 3

Alkanes mainly show reactions having

1. Free radical formation
2. Ionic elimination
3. Ionic formation
4. Heat/photochemical substitution.

✅ Correct Answer: 4

.see-Butyl chloride on boiling with alc. KOH gives ......... as the main product.

1. 1-Butene
2. 2-Butene
3. 1-Butanol
4. 2-Butanol.

✅ Correct Answer: 2

.Isopropyl bromide on Wurtz reaction gives

1. Hexane
2. Propane
3. 2, 3--Dimethylbutane
4. Neohexane.

✅ Correct Answer: 3

The catalyst used in the manufacture of polyethene by Ziegler method is

1. Titanium tetrachloride and triphenyl aluminium
2. Titanium tetrachloride and trimethyl aluminimum
3. Titanium dioxide
4. Titanium isopropoxide.

✅ Correct Answer: 2

Ozonolysis of p-xylene gives

1. Glyoxal
2. Methyl glyoxal
3. Both of these
4. None of these.

✅ Correct Answer: 3

Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly

1. iso-Butyl hydrogen sulphate
2. 2-Metyl-2-butanol
3. 2-Methyl-1-butanol
4. sec-Butyl hydrogen sulphate.

✅ Correct Answer: 2

When HBr adds to 1-butene in the presence of benzoyl peroxide, the product is

1. 1-Bromobutane
2. 2-Buromobutane
3. 1-Bromobutene
4. 2-Bromobutene.

✅ Correct Answer: 3

On chlorination, nitrobenzene gives ........ as the major product.

1. o-Chloro nitrobenzene
2. p-chloro nitrobenzene
3. m-chloro nitrobenzene
4. All the three.

✅ Correct Answer: 3

Towards electrophilic substitution the most reactive will be

1. Nitrobenzene
2. Aniline
3. Aniline hydrochloride
4. N-Acetylaniline.

✅ Correct Answer: 2

Which of the following is least acidic ?

1. Ethyne
2. Propyne
3. 1-Butyne
4. 2-Butyne.

✅ Correct Answer: 4

.Which of the following hydrocarbons would give a red precipitate on treatment with ammonical cuprous chloride solution ?

1. 2-Butene
2. 2-Butyne
3. 1, 3-Butadiene
4. 1-Butyne.

✅ Correct Answer: 4

The addition of HBr to styrene gives ..... as the major product. 1-Bromo-1-phenylethane

1. 1-Bromo-1-phenylethane
2. 2-Bromo-1phenylethane
3. Benzyl chloride
4. p-Bromophentl ethylene.

✅ Correct Answer: 1

Halogenation of alkanes is an example of .

1. Electrophilic substitution
2. Nucleopholic substitution
3. Free radical substitution
4. Reduction

✅ Correct Answer: 3

To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant will be

1. Ethyl chloride and n-butyl chloride
2. Methyl chloride and n-pentyl bromide
3. Ethyl bromide and n-bytyl bromide
4. n-Propyl bromide.

✅ Correct Answer: 4

Sulphur monochloride reacts with .... to give mustard gas.

1. Eathane
2. Ethene
3. Ethyne
4. Methane.

✅ Correct Answer: 2

Mesitylene can be obtained by polymerization of Ethyne

1. Ethyne
2. Ethene
3. Propene
4. Propyne.

✅ Correct Answer: 4

Starting from which of the following compounds methane as well as ethane can be prepared in separate single steps ?

1. Ethyl magnesium bromide
2. Methyl bromide
3. Sodium propanoate
4. Ethyl alcohol.

✅ Correct Answer: 2

Starting from which of t efollowing compounds can methane be prepared in one step ? All of these.

1. Sodium acetate
2. Aluminium carbide
3. Methyl magnesium bromide
4. All of these.

✅ Correct Answer: 4

Benzene on ozonolysis yields

1. Glyoxal
2. Acetone
3. Ethanal
4. Methanal.

✅ Correct Answer: 1

Among the following, the compound that can be most readily sulphonated is

1. Nitrobenzene
2. 1, 3-Dinitrobenzene
3. Chlorobenzene
4. Toluene.

✅ Correct Answer: 4

Ethyne can be prepared in a single step from

1. Calcium carbide
2. Ethylidene bromide
3. Ethylene bromide
4. All of these.

✅ Correct Answer: 4

1, 1-Dibromoethane when heated with zinc dust produces

1. Ethyl bromide
2. Ethene
3. Vinyl bromide
4. 2-Butene.

✅ Correct Answer: 4

Addition of HBr to iso-butylene mainly gives

1. iso-Butyl bromide
2. n-Butyl bromide
3. tert-Butyl bromide
4. sec-Butyl bromide.

✅ Correct Answer: 3

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IIT JEE Chemistry Of Hydrocarbons Part 2