Final answer:
The correct descriptor for the geometry around the carbon-carbon double bond in the given alkene, which has identical substituents on each carbon of the double bond, is 'neither E nor Z' as E/Z nomenclature requires different substituents around the double bond.
Step-by-step explanation:
The student has asked about the geometry around the carbon-carbon double bond in a given alkene, specifically whether the arrangement is E, Z, or neither. In the compound described (with chlorides and methyl groups on opposite sides of the double bond), the correct description would be neither E nor Z because the substituents on each carbon of the double bond are identical; therefore, E/Z nomenclature is not applicable.
In cases where we have such substitution, the molecule would typically be described as cis or trans, but this is not part of the given options. The molecule described appears to be trans-2-butene, but since 'cis' and 'trans' are not provided as choices, the correct answer to choose is neither E nor Z.