What is Isomerism? Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers. The word “isomer” is derived ...
Isomers are pairs of molecules with identical chemical formulas but different structures and properties. We can predominantly classify isomers into two classes, i.e. structural isomers and stereoisomers. In structural isomers, the bond between the atoms is different, whereas in stereoisomers, the bond between atoms is the same, but the relative positions of the atoms are different.
Isomerism previous year questions with solutions are given here. Isomerism is most widely observed in organic chemistry and has a huge application in chemistry and medicine. Isomers are molecules that have the same molecular formula but have a different arrangement of the atoms in space.
What is optical isomerism? Optical isomerism is a type of stereoisomerism in which the isomers have the same molecular formula and the structural formula but differ in their direction of rotation of plane polarized light.
Solution: Two compounds which contain the same number and kinds of atoms, and bonds and different spatial arrangements of the atoms, but have non-superimposable mirror images are called optical isomers. Optical isomers can occur when there is an asymmetric carbon atom. It forms a chiral centre of the molecule. 3-methyl-1-pentene shows optical isomerism. Hence option (4) is the answer.
The compound doesn’t show geometrical isomerism because one carbon atom attached to a double bond has the same substituent group (−CH 3), however, it can show optical isomerism, because it has one optically active chiral carbon atom. Question 5. Which of the following compounds will exhibit geometrical isomerism? A. 1 – phenyl – 2 ...