Organic Chemistry CDS Questions

CDS Chemistry

Organic Chemistry MCQ Questions


7.
Hydrocarbons containing at least one carbon–carbon triple bond are known as:
A.
Alkenes
B.
Aromatic hydrocarbons
C.
Alkynes
D.
Alkanes
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ANSWER :
C. Alkynes
8.
Hydrocarbons such as alkenes and alkynes, which contain multiple bonds and readily undergo addition reactions, are generally termed:
A.
Alicyclic hydrocarbons
B.
Saturated hydrocarbons
C.
Aromatic hydrocarbons
D.
Unsaturated hydrocarbons
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ANSWER :
D. Unsaturated hydrocarbons
9.

A series of carbon compounds having the same functional group, similar chemical properties, and differing successively by a –CH2– unit is known as a:

A.

Polymer series

B.

Homologous series

C.

Isomeric series

D.

Allotropic series

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ANSWER :

B. Homologous series

10.
Compounds having the same molecular formula but different structural arrangements of atoms are known as:
A.
Allotropes
B.
Polymers
C.
Isomers
D.
Homologues
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ANSWER :
C. Isomers
11.
Which of the following is the simplest member of the alkane homologous series?
A.
Butane
B.
Ethane
C.
Propane
D.
Methane
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ANSWER :
D. Methane
12.

Methane (CH4) and ethane (C2H6), both belonging to the alkane homologous series, differ from each other by:

A.

No structural difference

B.

One CH2 unit

C.

Three CH2 units

D.

Two CH2 units

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ANSWER :

B. One CH2 unit