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Free download in PDF Hydrocarbon Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams IIT-JEE, NEET, AIIMS etc. These short solved questions or quizzes are provided by Gkseries.
(1)
What is the old name of alkenes?
[A]
Olefin
[B]
Paraffin
[C]
Acetylene
[D]
None of the above
(2)
In water alkanes are .......... ?
[A]
Soluble
[B]
Insoluble
[C]
Bitter in taste
[D]
Sweet in taste
(3)
In which hydrocarbon all the four valencies of carbon are linked together with single bond?
[A]
Alkanes
[B]
Alkenes
[C]
Alkynes
[D]
None of the above
(4)
The segment -CH2CH2CH2CH2CH2CH2- represents the polymer named _______ .
[A]
polybutylene
[B]
polyhexene
[C]
polypropylene
[D]
polyethylene
(5)
Ethanol can be oxidized stepwise. What is the first stable intermediate product when ethanol is oxidized with a mild oxidation agent?
[A]
CH3COOH
[B]
CO2
[C]
CH3CHO
[D]
CH3CH2OH
(6)
What is the expected product formed from the reaction between 2-butene and Cl2?
[A]
1-chlorobutane
[B]
2-chlorobutane
[C]
2,3-dichlorobutane
[D]
2,2-dichlorobutane
Answer: 2,3-dichlorobutane
(7)
Which of the following will undergo an addition reaction with chlorine?
[A]
CH3CH2CH2CH3
[B]
CH3CH2CH=CHCH3
[C]
C6H6
[D]
None Of The Above
(8)
Which of the following statements is FALSE regarding the reaction between Cl2 and C2H6?
[A]
It is a substitution reaction
[B]
The reaction will give a single product of C2H5Cl
[C]
The reaction mechanism involves free radicals
[D]
The reaction can be initiated with either sunlight or heat
Answer: The reaction will give a single product of C2H5Cl
(9)
Which of the following compounds displays optical isomerism?
[A]
CH2(OH)-CH2(OH)
[B]
CH3-CHCl-COOH
[C]
CH2=CHCl
[D]
None of the Above
(10)
Which compound is used for making perfumes and dyes?
[A]
Ethyl alcohol
[B]
Ethyl acetate
[C]
Ethanoate
[D]
Ethanone
(11)
Aromatic hydrocarbons are also known as ........... ?
[A]
Acetaldehyde
[B]
Butyne
[C]
Arenes
[D]
Arines
(12)
Name an organic compound in which RCOOCOR is a functional group?
[A]
Ester
[B]
Acid anhydride
[C]
Dimethyl ether
[D]
Aliphatic hydrocarbon
(13)
Name an open chain hydrocarbon which is odourless?
[A]
Aldehydes
[B]
Aromatic
[C]
Aliphatic
[D]
Acetate
(14)
What is the general formula of alkenes?
[A]
CnH2n
[B]
CnH2n-2
[C]
CnH2n+2
[D]
CnH2n+OH
(15)
Why alkanes are known as saturated hydrocarbon?
[A]
It consists of triple bond
[B]
It consists of double bond
[C]
It consists of single bond
[D]
None of the above
Answer: It consists of single bond
(16)
Name a hydrocarbon which is a main component of natural gas?
[A]
Methyl
[B]
Methane
[C]
Ethyl
[D]
None of the above
(17)
Two isomeric forms of a saturated hydrocarbon
[A]
have the same structure
[B]
have different compositions of elements
[C]
have the same molecular formula
[D]
have a different content of the isotopes of hydrogen
Answer: have the same molecular formula
(18)
Which of the following hydrocarbons does not have isomers?
[A]
C7H16
[B]
C6H14
[C]
C5H10
[D]
C3H8
(19)
The name of the alkane isomer of cis-3-hexene is:
[A]
2-methylpentane
[B]
3-methylpentane
[C]
n-hexane
[D]
cyclohexane
(20)
Which of the following does NOT exhibit geometric isomerism? (Hint: draw them!)
[A]
4-octene
[B]
2-pentene
[C]
3-hexene
[D]
1-hexene
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