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FAQs on Isomerism in One Shot
| 1. What is isomerism in chemistry? |  |
Ans. Isomerism in chemistry refers to the phenomenon where two or more compounds have the same molecular formula but differ in the arrangement of atoms or the spatial orientation of their atoms. This results in different physical and chemical properties for these compounds, known as isomers.
| 2. What are the main types of isomerism? | |
Ans. The main types of isomerism include structural isomerism and stereoisomerism. Structural isomerism occurs when isomers differ in the connectivity of their atoms, while stereoisomerism involves isomers that have the same connectivity but differ in the spatial arrangement of atoms. Stereoisomerism can further be divided into geometric (cis-trans) isomerism and optical isomerism.
| 3. How does structural isomerism differ from stereoisomerism? | |
Ans. Structural isomerism differs from stereoisomerism in that structural isomers have different atomic arrangements, leading to distinct connectivity between atoms, whereas stereoisomers have the same atomic arrangement but differ in the three-dimensional orientation of their atoms. This distinction is crucial for understanding the properties and reactivity of the compounds involved.
| 4. Can you provide an example of geometric isomerism? | |
Ans. An example of geometric isomerism can be seen in 2-butene (C₄H₈). It has two geometric isomers: cis-2-butene, where the two methyl groups are on the same side of the double bond, and trans-2-butene, where the methyl groups are on opposite sides. These isomers exhibit different physical properties, such as boiling points and densities.
| 5. What is optical isomerism and why is it significant? | |
Ans. Optical isomerism occurs when molecules can exist in two forms that are non-superimposable mirror images of each other, known as enantiomers. This type of isomerism is significant because enantiomers can have vastly different biological activities. For instance, one enantiomer of a drug may be therapeutic, while the other could be ineffective or even harmful.
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Apr 20, 2026 Last updated
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