Question

Geometrical isomerism is also known as:

• A. cis-trans isomerism
• B. chain isomerism
• C. tautomerism
• D. none of the above

Answer 1

The correct option is A cis-trans isomerism

Cis/trans isomerism (also known as geometric isomerism) is a form of stereoisomerism describing the relative orientation of functional groups within a molecule.
The terms cis and trans are from Latin, in which cis means "on this side" and trans means "on the other side" or" across". The term" geometric isomerism" is considered as an obsolete synonym of "cis/trans isomerism" by IUPAC.