Organic Chemistry NDA Questions

NDA Chemistry

Organic Chemistry MCQ Questions


7.
Organic compounds whose carbon atoms are linked in a straight or branched chain (not forming a ring) are called:
A.
Acyclic (open chain) compounds
B.
Heterocyclic compounds
C.
Aromatic compounds
D.
Cyclic compounds
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ANSWER :
A. Acyclic (open chain) compounds
8.
Compounds in which carbon atoms are joined together to form a closed ring structure are known as:
A.
Aliphatic compounds
B.
Saturated compounds
C.
Unsaturated compounds
D.
Cyclic compounds
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ANSWER :
D. Cyclic compounds
9.
Benzene and its derivatives, characterised by a six-membered ring with alternate double bonds, belong to which class of compounds?
A.
Heterocyclic compounds
B.
Aliphatic compounds
C.
Alicyclic compounds
D.
Aromatic compounds
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ANSWER :
D. Aromatic compounds
10.
A cyclic compound that contains at least one atom other than carbon (such as nitrogen, oxygen or sulphur) in its ring is called:
A.
Heterocyclic compound
B.
Aromatic compound
C.
Alkane
D.
Homocyclic compound
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ANSWER :
A. Heterocyclic compound
11.
Hydrocarbons containing only single covalent bonds between carbon atoms are known as:
A.
Cyclic hydrocarbons
B.
Saturated hydrocarbons
C.
Aromatic hydrocarbons
D.
Unsaturated hydrocarbons
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ANSWER :
B. Saturated hydrocarbons
12.
Hydrocarbons containing at least one carbon-carbon double or triple bond are called:
A.
Saturated hydrocarbons
B.
Paraffins
C.
Unsaturated hydrocarbons
D.
Alkanes
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ANSWER :
C. Unsaturated hydrocarbons