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Isomerism Video Lecture | Chemistry for JEE Main & Advanced

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FAQs on Isomerism Video Lecture - Chemistry for JEE Main & Advanced

1. What is isomerism and why is it important in chemistry?
Ans. Isomerism is the phenomenon where two or more compounds have the same molecular formula but different structural arrangements or spatial orientations. This is important in chemistry because isomers can have different physical and chemical properties, which can significantly affect their behavior in chemical reactions, biological systems, and industrial applications.
2. What are the main types of isomerism?
Ans. The main types of isomerism are structural isomerism and stereoisomerism. Structural isomerism occurs when compounds have different connectivity of atoms, while stereoisomerism arises when compounds 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 (enantiomers).
3. How do structural isomers differ from stereoisomers?
Ans. Structural isomers differ in the way their atoms are connected to each other, resulting in different structural formulas. In contrast, stereoisomers have the same structural formula but differ in the three-dimensional arrangement of their atoms in space. This difference can lead to varying properties and reactivities of the compounds.
4. Can you provide examples of geometric isomers?
Ans. Yes, geometric isomers are commonly seen in alkenes due to the restricted rotation around the double bond. For example, in 2-butene, there are two geometric isomers: the cis isomer, where the two methyl groups (CH₃) are on the same side of the double bond, and the trans isomer, where the methyl groups are on opposite sides.
5. Why is optical isomerism significant in pharmaceuticals?
Ans. Optical isomerism is significant in pharmaceuticals because enantiomers (optical isomers) can have drastically different effects in biological systems. One enantiomer may be therapeutically beneficial, while the other could be inactive or even harmful. This is crucial in drug development, where the correct enantiomer must be used to ensure safety and efficacy.

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