The correct IUPAC name for the given molecule should be ________.
1
4,4-dimethylbutan-2-ol
2
4-methylpentan-2-ol
3
2-methylpentan-4-ol
4
1,1-dimethylbutan-3-ol
Official Solution
Correct Option: (2)
Step 1: Concept
IUPAC nomenclature for branched alcohols requires identifying the longest chain containing the group and numbering it to give the hydroxyl carbon the lowest possible number. Step 2: Analysis
The structure is . The longest continuous carbon chain containing the group has 5 carbons (pentane). Step 3: Numbering
Numbering from the end closer to the group:
Carbon 2 holds the hydroxyl ( ) group.
Carbon 4 holds a methyl ( ) substituent.
Step 4: Conclusion
Combining the parts gives 4-methylpentan-2-ol. Final Answer:(B)
02
PYQ 2022
medium
chemistryID: cuet-ug-
IUPAC name of neopentyl chloride is
1
2
3
4
Official Solution
Correct Option: (2)
The IUPAC name of neopentyl chloride is .
The neopentyl group, also known as , consists of a central carbon bonded to three methyl groups and one chlorine atom. In the IUPAC name, we prioritize the chloro substituent by assigning it the lowest possible number, which is .
The two methyl groups are named as " " to indicate their positions on the carbon chain.
The parent hydrocarbon is propane since it contains three carbon atoms.
Therefore, the correct answer is (B): .
03
PYQ 2023
medium
chemistryID: cuet-ug-
IUPAC name of propiophenone is:
1
2-Phenylpropanone
2
1-Phenylpropan-1-one
3
Ethyl phenyl Ketone
4
1-Phenylethanone
Official Solution
Correct Option: (2)
The correct option is (B): 1-Phenylpropan-1-one
04
PYQ 2023
medium
chemistryID: cuet-ug-
Correct IUPAC name of the compound given below is:
1
5-Ethoxy heptane
2
3-Ethoxy heptane
3
1-Heptoxy ethane
4
1-methyl-2-ethoxy hexane
Official Solution
Correct Option: (2)
The correct option is (B) : 3-Ethoxy heptane
05
PYQ 2023
medium
chemistryID: cuet-ug-
The IUPAC name of
1
1-Methoxy-2-methylbut-3-en-2-ol
2
4-Methoxy-3-methylbut-1-en-3-ol
3
2-Methoxy-1-methylbut-3-en-2-ol
4
3-Methoxy-4-methylbut-1-en-3-ol
Official Solution
Correct Option: (1)
The correct option is (A) : 1-Methoxy-2-methylbut-3-en-2-ol
06
PYQ 2023
medium
chemistryID: cuet-ug-
The correct IUPAC name of tert-butyl benzyl ether is-
1
tert-Butoxy phenyl methane
2
2-methyl-2-phenyl methoxy propane
3
1,1-Dimethyl benzyl methoxy ethane
4
tert-Butyl methoxy benzene
Official Solution
Correct Option: (1)
The correct option is (A) : tert-Butoxy phenyl methane
