Practice Questions
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Which of the following cycloalkanes exhibits both chirality and a significant stability due to its ring size?
Cyclohexane can fold into a chair shape, which spreads strain and keeps the ring stable. Other options are incorrect because Some think the small 4‑me...
In a bicyclic cycloalkane derivative with two methyl substituents, one on each of the fused rings, determine the correct cis or trans configuration if one methyl is on the equatorial plane of one ring and the other is axial on the adjacent ring. Which configuration is represented?
The methyl on the equatorial plane points downward relative to the ring’s plane. Other options are incorrect because Some might think cis because the ...
In a cyclohexane derivative with two substituents, one methyl group at the 1-position and another at the 3-position, which configuration will be observed if the methyl at the 1-position is axial and the methyl at the 3-position is equatorial?
In cyclohexane, the axial position points straight up or down along the ring axis. Other options are incorrect because The cis option assumes both met...
Which of the following correctly identifies the IUPAC name for a cycloalkane with a six-membered ring and one methyl group attached at the 1-position?
The name starts with the prefix for the substituent, here "1-methyl", followed by the ring name "cyclohexane". Other options are incorrect because "Cy...
Consider a cyclohexane molecule with two substituents: a bromine atom located at the 1-position and an ethyl group at the 3-position. How would you correctly name this compound following IUPAC conventions?
The IUPAC rule orders substituents alphabetically, not by their locants. Other options are incorrect because Some students think the substituent with ...
Cycloalkanes are to the prefix 'cyclo-' as alkenes are to what prefix?
The prefix 'ene' marks a double bond in the carbon chain. Other options are incorrect because Many think 'yne' is like 'ene' because both end with e, ...
If a cyclopentane has two substituents, one on carbon 1 and another on carbon 4, what is the primary reason for the preference of numbering the ring starting from carbon 1 instead of carbon 2?
Choosing carbon 1 as the starting point gives the substituents the smallest possible numbers. Other options are incorrect because The rule does not us...
A team of chemists is developing a new drug that involves a cyclohexane ring structure with multiple substituents. They need to name their compound correctly to ensure clarity in communication and research. If one substituent is a methyl group and another is a hydroxyl group, while the hydroxyl group is positioned at carbon 1 and the methyl group at carbon 3, what is the correct IUPAC name for the compound?
The hydroxyl group is a functional group and gets the lowest number. Other options are incorrect because It puts the methyl group name before the hydr...
Which of the following is the correct name for a cyclohexane with one methyl group at position 1 and a bromine at position 3?
The name starts with the lowest number for the bromine, because bromine gets priority over methyl when choosing locants. Other options are incorrect b...
In naming cycloalkanes, the prefix 'cyclo-' is added before the root name to indicate that the structure is a closed ring. When numbering the carbons, it is important to assign the lowest possible numbers to the substituents, and these substituents should be ordered _____ to ensure clarity in the name.
Substituents are listed alphabetically, no matter where they sit on the ring. Other options are incorrect because Numbering is about where each group ...
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