Chapter 12, Problem 2P

Answer true or false.

1. Both ethylene and acetylene are planar molecules.

An alkene in which each carbon of the double bond has two different groups bonded to it will show cis-trans isomerism.

Cis-trans isomers have the same molecular formula but a different connectivity of their atoms.

Cis-2-butene and trans-2-butene can be inter- converted by rotation about the carbon-carbon double bond.

Cis-trans isomerism is possible only among appropriately substituted alkenes.

Both 2-hexene and 3-hexene can exist as pairs of cis-trans isomers.

( g) Cyclohexene can exist as a pair of cis-trans isomers.

(h) 1-Chloropropene can exist as a pair of cis-trans isomers.