Question

Which statements is/are correct about cyclohexene and cyclodecene?
A. Z or cis-cyclohexene is more stable than E or transisomer
B. Z or cis-cyclodecene is more stable than E or transisomer
C. Z or cis-cyclohexene is less stable than E or transisomer
D. Z or cis-cyclodecene is less stable than E or transisomer

Answer 1

The chemical compounds are formed by the difference in the arrangement of the constituent atoms in the compound. Some of the compounds have the same chemical formula but the arrangement of the atoms in the compound is different. These types of compounds are called isomers.

Complete step by step answer:
The compounds which are different in just the structure but have the same formula are called isomers, some of the isomers can show optical activity, these are called optical isomerism.
When the same compound has a different spatial arrangement in the space, then that is called stereoisomers.
One type of isomerism is cis-trans isomerism. In this type of isomerism, the group is attached either to the same side of the double bond or the different sides to the double bond. If the groups are on the same side of the double bond then these are called the cis type isomer and if the groups are on the opposite side of the double bond then they are called a trans isomer.
This placement of the groups on the space may lead to several properties that range from dipole moment to the straining of the bond.
Trans cyclohexene is less stable than the cis counterpart due to the straining of the bond hence the cis part is more stable, so option (A) is true
Eight membered or larger rings of the carbon atom can have a trans substituted double bond in the ring, so we can say that rings with members more than 8 are stable in the trans-state

So, the correct answer is Option A,D .

Note: The cis-trans naming is also replaced by the naming convention of Z and E. here Z is the other name of cis type isomer and E is the other name of trans type isomer. E stands for Entagagen meaning opposite and Z stands for Zussamen meaning together.