Nomenclature (Trivial and IUPAC) NEET Questions

Organic Chemistry - Some Basic Principles of Organic Chemistry

Nomenclature (Trivial and IUPAC) MCQ Questions


13.
The IUPAC name of (CH3)2CHCH2CH(CH3)2 is:
A.
3,3-Dimethylpentane
B.
2,4-Dimethylpentane
C.
2,3-Dimethylpentane
D.
2,4-Dimethylbutane
😑 View Answer Rough Work Error
ANSWER :
B. 2,4-Dimethylpentane
14.
The IUPAC name of CH3CH(CH3)CH(CH2CH3)CH2CH2CH3 is:
A.
3-Methyl-4-ethylhexane (3-Ethyl-2-methylhexane)
B.
4-Ethyl-3-methylhexane
C.
2-Methyl-3-ethylhexane
D.
3-Ethyl-4-methylhexane
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ANSWER :
A. 3-Methyl-4-ethylhexane (3-Ethyl-2-methylhexane)
15.
Choose the correct IUPAC name for the compound: CH3-CH(C2H5)-CH2-CH(CH3)-CH3
A.
4-Ethyl-2-methylpentane
B.
3,5-Dimethylhexane
C.
2,4-Dimethylhexane (or 3-ethyl-5-methylhexane = wrong)
D.
2-Methyl-4-ethylpentane
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ANSWER :
C. 2,4-Dimethylhexane (or 3-ethyl-5-methylhexane = wrong)
16.
The IUPAC name of the compound with structure CH3-C(CH3)2-CH2-CH3 is:
A.
2-Methylpentane
B.
2,3-Dimethylbutane
C.
3,3-Dimethylbutane
D.
2,2-Dimethylbutane
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ANSWER :
D. 2,2-Dimethylbutane
17.
The IUPAC name of isooctane (an antiknock additive) is:
A.
2,3,4-Trimethylpentane
B.
2,2,4-Trimethylpentane
C.
2,2,3-Trimethylpentane
D.
2,4,4-Trimethylpentane
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ANSWER :
B. 2,2,4-Trimethylpentane
18.
The IUPAC name for CH3CH2CH(CH3)CH(CH3)CH2CH3 is:
A.
2,3-Dimethylhexane
B.
2,3-Dimethylpentane
C.
3,4-Dimethylpentane
D.
3,4-Dimethylhexane
😑 View Answer Rough Work Error
ANSWER :
D. 3,4-Dimethylhexane