Match the elements of Column I to elements of Column II. There can be single or multiple matches. Column I (a) Diastereomers (b) Chiral centres (c) Tautomers (d) pent-2-ene Column (p) spontaneously interconvertible (q) cis-trans isomerism (r) restricted rotation (s) stereoisomerism

First, let's understand what each term in Column I refers to: (a) Diastereomers: Stereoisomers that are not mirror images of each other. (b) Chiral centers: Carbon atoms bonded to four different groups, resulting in a non-superimposable mirror image. (c) Tautomers: Isomers that can spontaneously interconvert by the movement of atoms or groups within their structure. (d) pent-2-ene: A five-carbon alkene having a double bond between the 2nd and 3rd carbons.

Now, let's understand what each element in Column II refers to: (p) spontaneously interconvertible: Chemical species that can change into another form by rearrangement of atoms within their structure. (q) cis-trans isomerism: Isomers that have differences in the arrangement of substituent groups due to restricted rotation around a carbon-carbon double bond. (r) Restricted rotation: The limited ability of single bonds to rotate freely within a molecule. (s) stereoisomerism: Isomers having the same molecular formula and connectivity but different 3D arrangements of atoms.

With the understanding of each element in Columns I and II, we can now find the matching elements. (a) Diastereomers: These are stereoisomers and do not have restricted rotation and are not spontaneously interconvertible. Matching element: (s) stereoisomerism (b) Chiral centers: Chiral centers are associated with stereoisomerism and do not have restricted rotation. Matching element: (s) stereoisomerism (c) Tautomers: Tautomers are the species that can spontaneously interconvert due to the movement of atoms or groups within their structure. Matching element: (p) spontaneously interconvertible (d) pent-2-ene: This is an alkene, and cis-trans isomerism occurs in alkenes due to restricted rotation around the carbon-carbon double bond. Matching elements: (q) cis-trans isomerism, (r) restricted rotation Finally, the matched elements of Column I with Column II are as follows: (a) Diastereomers - (s) stereoisomerism (b) Chiral centers - (s) stereoisomerism (c) Tautomers - (p) spontaneously interconvertible (d) pent-2-ene - (q) cis-trans isomerism, (r) restricted rotation