Class 11 Exam > Class 11 Questions > a)3b)4c)5d)7Correct answer is option 'A'. Can... Start Learning for Free
- a)3
- b)4
- c)5
- d)7
Correct answer is option 'A'. Can you explain this answer?
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a)3b)4c)5d)7Correct answer is option 'A'. Can you explain this answer?
The compounds with each doubly bonded carbon attached to two different groups (like Cab=Cab, Cab=Ccd) exhibit geometrical isomerism i.e., cis and trans forms. The geometrical isomerism arises due to restricted rotation of double bond.
However, even though there is restricted rotation for triple bond, alkynes do not exhibit geometrical isomerism, since the triply bonded carbons are attached to one group each only.
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a)3b)4c)5d)7Correct answer is option 'A'. Can you explain this answer?
Cis-trans isomerism is a type of stereoisomerism in which the compounds have the same molecular formula and connectivity but differ in the arrangement of their atoms in space due to the presence of a double bond.
Explanation:
The correct option is (a) 2-butene. Here's why:
2-Butene has a double bond between the second and third carbon atoms, which allows for cis-trans isomerism to occur. The two possible isomers are:
- cis-2-butene: The two methyl groups are on the same side of the double bond.
- trans-2-butene: The two methyl groups are on opposite sides of the double bond.
On the other hand, the other options do not have a double bond or have functional groups that do not allow for cis-trans isomerism:
- 2-Butyne: This compound has a triple bond between the second and third carbon atoms, so it cannot have cis-trans isomers.
- 2-Butanol: This compound has a hydroxyl group (-OH) attached to the second carbon atom, which does not allow for cis-trans isomerism.
- Butanal: This compound has a carbonyl group (C=O) attached to the first carbon atom, which also does not allow for cis-trans isomerism.
Therefore, the correct answer is 2-butene (option a) as it has a double bond between the second and third carbon atoms, which allows for cis-trans isomerism.
Explanation:
The correct option is (a) 2-butene. Here's why:
2-Butene has a double bond between the second and third carbon atoms, which allows for cis-trans isomerism to occur. The two possible isomers are:
- cis-2-butene: The two methyl groups are on the same side of the double bond.
- trans-2-butene: The two methyl groups are on opposite sides of the double bond.
On the other hand, the other options do not have a double bond or have functional groups that do not allow for cis-trans isomerism:
- 2-Butyne: This compound has a triple bond between the second and third carbon atoms, so it cannot have cis-trans isomers.
- 2-Butanol: This compound has a hydroxyl group (-OH) attached to the second carbon atom, which does not allow for cis-trans isomerism.
- Butanal: This compound has a carbonyl group (C=O) attached to the first carbon atom, which also does not allow for cis-trans isomerism.
Therefore, the correct answer is 2-butene (option a) as it has a double bond between the second and third carbon atoms, which allows for cis-trans isomerism.
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